cside Blog

9 best credential stuffing prevention tools in 2026, ranked

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

The best credential stuffing prevention tools for 2026, ranked, with cside first for device and bot detection, then 8 real tools compared honestly.

9 best device fingerprinting software in 2026, ranked and compared

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

The 9 best device fingerprinting software options for 2026, ranked, with cside first for a device ID plus a real-time fraud verdict from one first-party script.

Best device intelligence for fraud prevention: 9 tools ranked for 2026

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

The best device intelligence for fraud prevention in 2026, ranked. cside first for device ID plus a fraud verdict, then 8 real vendors compared.

Best device intelligence platforms in 2026, ranked and compared

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

Compare the best device intelligence platforms for 2026, ranked, with cside first for device ID plus AI agent, VPN, and bot detection from one script.

8 best digital skimming protection tools in 2026, ranked

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

Compare the 8 best digital skimming protection tools for 2026, ranked, with cside first for real-session script monitoring and PCI DSS coverage.

8 best Castle alternatives in 2026, cside compared

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

Looking for a Castle alternative? Compare the 8 best account-protection and device-intelligence tools for 2026, ranked, with cside first.

DataDome Pricing in 2026: Plans, Costs, and a Cheaper Alternative

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

What DataDome actually costs in 2026: its quote-based model, the public AWS Marketplace tiers, and how cside compares from $99/month with a free tier.

DataDome vs Cloudflare: bot and client-side security compared (2026)

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

DataDome vs Cloudflare compared for bot management and client-side security: deployment, pricing, and use cases, plus where cside fits as a first-party third option.

DataDome vs Imperva: bot and client-side protection compared (2026)

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

DataDome vs Imperva compared for bot management and client-side protection: positioning, pricing, and use cases, plus where cside fits.

Ecommerce Fraud Prevention: A Practical Guide for 2026

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

A practical ecommerce fraud prevention guide: the main fraud types, how to stop each one, and a layered defense framework from browser to checkout.

FingerprintJS pricing in 2026: free library vs Fingerprint Pro, explained

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

A clear guide to FingerprintJS pricing in 2026: the free open-source library versus Fingerprint Pro's per-API-call plans, plus a cheaper alternative.

8 best GreyNoise alternatives and competitors in 2026

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

GreyNoise labels internet scan noise and IP reputation. Compare 8 GreyNoise alternatives for 2026, plus where cside adds browser-session signals.

How to prevent fake job applicants: a step-by-step guide for 2026

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

How to prevent fake job applicants: verify identity, read device and network signals during the application, and spot the red flags before you hire.

How to Prevent JavaScript Injection: A Practical Step-by-Step Guide

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

A practical guide to preventing JavaScript injection: fix XSS, lock down third-party scripts with CSP and SRI, and monitor real browser sessions.

9 best IPQualityScore alternatives in 2026, cside compared

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

Looking for an IPQualityScore alternative? Compare 9 IPQS alternatives for 2026, ranked, with cside first for first-party device and VPN detection.

Jscrambler pricing in 2026: plans, model, and what to expect

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

A buyer's guide to Jscrambler pricing in 2026: its quote-based model, the two products it sells, and how it compares to cside's public client-side security prices.

9 best Kount alternatives and competitors in 2026, ranked

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

Looking for a Kount alternative? Compare the 9 best fraud-prevention platforms for 2026, ranked, with cside first for device intelligence and chargeback proof.

9 best new account fraud prevention tools in 2026, ranked

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

The 9 best new account fraud prevention tools for 2026, ranked, with cside first for device intelligence at signup that catches fraud before the account exists.

Online payment fraud prevention: a practical guide for 2026

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

A practical guide to online payment fraud prevention: the main fraud types, the prevention layers that stop them, and where device evidence at checkout fits.

PerimeterX Pricing in 2026: What HUMAN Security Costs (and a Transparent Alternative)

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

PerimeterX (now HUMAN Security) has no public pricing. Here is the known model in 2026, its modules, and a transparent, listed-price alternative.

9 best Sardine alternatives in 2026, compared

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

Looking for a Sardine alternative or competitor? Compare the 9 best fraud and device-intelligence options for 2026, ranked, with honest verdicts.

9 best SEON alternatives in 2026, cside compared

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

Looking for a SEON alternative? Compare the 9 best SEON competitors for 2026, ranked, with cside first for device intelligence and fraud signals.

SEON vs Fingerprint: fraud detection compared (2026)

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

SEON vs Fingerprint compared for fraud detection: positioning, pricing, and use cases, plus where cside fits as a first-party third option.

7 best Stytch alternatives in 2026, ranked for auth and fraud teams

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

Comparing Stytch alternatives? Here are 7 real auth and CIAM options ranked, plus where cside fits as a complementary device and fraud signal layer.

9 best ThumbmarkJS alternatives in 2026, ranked and compared

Mike Kutlu — Fri, 21 Aug 2026 00:00:00 GMT

Looking for a ThumbmarkJS alternative? Compare the 9 best options for 2026, ranked, with cside first for a first-party device ID plus a fraud verdict.

What Causes Third-Party JavaScript Security Risks

Mike Kutlu — Wed, 19 Aug 2026 00:00:00 GMT

Third-party scripts execute with full browser access. Learn what makes third-party JavaScript a security risk and why server-side tools miss it.

What Is Data Skimming Protection for Ecommerce

Mike Kutlu — Wed, 19 Aug 2026 00:00:00 GMT

Data skimming steals card data in the browser, invisible to server tools. Learn what data skimming protection is and how to stop Magecart attacks.

What Is a Business Associate Agreement (BAA)? HIPAA BAAs Explained

Simon Wijckmans — Tue, 18 Aug 2026 00:00:00 GMT

A Business Associate Agreement (BAA) is a HIPAA-required contract between a covered entity and a vendor that handles protected health information on its behalf, binding the vendor to safeguard that data. This guide explains what a BAA covers, who needs one, and why some website vendors refuse to sign.

What Is an Approved Scanning Vendor (ASV)? PCI ASV Scans Explained

Simon Wijckmans — Tue, 18 Aug 2026 00:00:00 GMT

An Approved Scanning Vendor (ASV) is a company certified by the PCI Security Standards Council to run the external vulnerability scans that PCI DSS requirement 11.3.2 mandates every quarter. This guide explains what an ASV scan covers, how it differs from internal scans and penetration tests, and what it cannot see.

What Is Cardholder Data (CHD)? PCI Definitions, CDE, and SAD Explained

Simon Wijckmans — Tue, 18 Aug 2026 00:00:00 GMT

Cardholder data (CHD) is the payment card information PCI DSS exists to protect: the primary account number alone or with the cardholder's name, expiration date, or service code. This guide defines CHD, sensitive authentication data (SAD), and the cardholder data environment (CDE), and explains what each means for scope.

What Is Customer Journey Hijacking? How Injected Scripts Steal Shoppers

Simon Wijckmans — Tue, 18 Aug 2026 00:00:00 GMT

Customer journey hijacking is the manipulation of a visitor's session by unauthorized code (injected ads, forced redirects, swapped affiliate tags) that diverts them away from the intended purchase path. This guide explains how it happens, what it costs, and how to see it on your own site.

What Is DOM-Based XSS? How DOM Cross-Site Scripting Works

Simon Wijckmans — Tue, 18 Aug 2026 00:00:00 GMT

DOM-based XSS is a cross-site scripting attack where the vulnerability lives entirely in client-side JavaScript: the page's own code reads attacker-controlled input and writes it into the DOM unsafely. This guide explains how it differs from reflected and stored XSS, common sources and sinks, and how to detect it.

What Is ePHI? Electronic Protected Health Information Under HIPAA Explained

Simon Wijckmans — Tue, 18 Aug 2026 00:00:00 GMT

ePHI is electronic protected health information: any individually identifiable health data that is created, stored, or transmitted electronically, and that HIPAA requires covered entities and business associates to safeguard. This guide defines ePHI, distinguishes it from PHI and de-identified data, and lists the 18 HIPAA identifiers.

What Is JavaScript Injection? Script Injection Attacks Explained

Simon Wijckmans — Tue, 18 Aug 2026 00:00:00 GMT

JavaScript injection is the insertion of attacker-controlled script into a web page so it executes in visitors' browsers with the page's full privileges. This guide covers the injection paths (XSS, compromised third parties, extensions), what injected scripts actually do, and how to detect them.

PCI DSS Report on Compliance (RoC): What It Is and When You Need One

Simon Wijckmans — Tue, 18 Aug 2026 00:00:00 GMT

A PCI DSS Report on Compliance is required for Level 1 merchants and service providers. Learn what a RoC covers, who signs it, and how to prepare.

What Is PII Harvesting? How Scripts Collect Personal Data at Scale

Simon Wijckmans — Tue, 18 Aug 2026 00:00:00 GMT

PII harvesting is the systematic collection of personally identifiable information from websites and forms, usually by scripts that read what users type, sometimes criminal, sometimes an over-collecting vendor tag. This guide explains the techniques, the difference from PII itself, and how to see harvesting on your own pages.

What Is RASP? Runtime Application Self-Protection Defined

Simon Wijckmans — Tue, 18 Aug 2026 00:00:00 GMT

RASP (Runtime Application Self-Protection) is a security technology that runs inside an application and blocks attacks from within at runtime, using the application's own context. This guide defines RASP, compares it to WAFs, and explains where its server-side model stops, and what plays the equivalent role in the browser.

What is SAQ D? Complete Guide for Merchants and Service Providers

Simon Wijckmans — Tue, 18 Aug 2026 00:00:00 GMT

SAQ D is the longest PCI DSS self-assessment questionnaire and applies to the widest scope. Understand who needs it, what it covers, and how to prepare.

What Is That Tracker? A Field Guide to the Domains in Your Network Tab

Simon Wijckmans — Tue, 18 Aug 2026 00:00:00 GMT

You open DevTools and see requests to doubleclick.net, adnxs.com, clarity.ms, scorecardresearch.com, domains you never added. This guide explains what the most common tracker domains actually are, who operates them, what data they touch, and when an unknown domain in your network tab is a real problem.

What Is Web Tracking? How Websites Identify and Follow Visitors

Simon Wijckmans — Tue, 18 Aug 2026 00:00:00 GMT

Web tracking is the collection of data about visitors' behavior across websites, using cookies, pixels, fingerprinting, and session-replay scripts. This guide explains how each technique works, who is doing the tracking, what the law requires, and how site owners can see what their own pages are collecting.

Carding Attack: What It Is and How to Detect the Automation Behind It

Simon Wijckmans — Mon, 17 Aug 2026 00:00:00 GMT

A carding attack tests stolen or generated card numbers against your checkout at scale. Understand the attack, spot the browser-layer signature, and stop it.

Card Not Present Fraud: How CNP Attacks Work and How to Prevent Them

Simon Wijckmans — Mon, 17 Aug 2026 00:00:00 GMT

Card not present fraud drives most online payment losses. Understand how CNP attacks work, the browser signals that expose them, and the controls that stop them.

What is PCI DSS? A Practical Guide to the Payment Card Industry Data Security Standard

Simon Wijckmans — Mon, 17 Aug 2026 00:00:00 GMT

PCI DSS is the security standard every business handling payment cards must follow. Understand the 12 requirements, compliance levels, and how to prepare.

Phia cookie stuffing: Bill Gates' daughter's app, explained

Simon Wijckmans — Sat, 15 Aug 2026 00:00:00 GMT

Bloomberg alleges Phia, co-founded by Phoebe Gates, forced affiliate clicks. How it worked, and six tests merchants can run on their own order data.

PCI DSS Requirements: The 12 Requirements Explained (4.0.1)

Simon Wijckmans — Fri, 14 Aug 2026 00:00:00 GMT

PCI DSS has 12 requirements grouped under six security goals. Understand what each requires, what changed in 4.0.1, and where most environments have gaps.

What is a BIN Attack? How to Detect and Stop Automated Card Testing

Simon Wijckmans — Fri, 14 Aug 2026 00:00:00 GMT

A BIN attack tests thousands of stolen or generated card numbers against your checkout. Detect the browser-layer signature and stop it before it costs you.

What is an AI Agent? Definition, Examples, and What It Means for Your Website

Simon Wijckmans — Fri, 14 Aug 2026 00:00:00 GMT

An AI agent is a system that uses an LLM to complete multi-step tasks autonomously. Understand the definition, examples, and why agents change website security.

Browser Fingerprinting for Fraud Prevention: How It Works and Why It Matters

Simon Wijckmans — Thu, 13 Aug 2026 00:00:00 GMT

Browser fingerprinting produces a stable identifier from dozens of browser properties. Understand how it works, how it differs from device fingerprinting, and where it fits.

How to Detect Anthropic Computer Use on Your Website

Simon Wijckmans — Thu, 13 Aug 2026 00:00:00 GMT

Anthropic's Computer Use agent controls a real browser to complete tasks. Detect the signature at the browser layer before the agent transacts on your site.

What is Account Takeover (ATO)? Definition, Attack Patterns, and Prevention

Simon Wijckmans — Thu, 13 Aug 2026 00:00:00 GMT

What is ATO? Account takeover (ATO) is one of the most common online fraud vectors. Understand what ATO is, the attack patterns behind it, and how to stop it at the browser layer.

What is device intelligence? A plain-English guide to how it works

Mike Kutlu — Wed, 12 Aug 2026 00:00:00 GMT

Device intelligence builds a stable device identifier from browser signals, not cookies, so it survives VPNs, incognito mode, and cookie clearing.

Transaction and Payment Fraud Detection Software: The Checkout Evidence Gap

Mike Kutlu — Tue, 11 Aug 2026 00:00:00 GMT

Payment fraud detection software has to capture browser session evidence at checkout, not after, so merchants can win chargeback disputes later.

What are device-bound sessions? How they stop session hijacking

Mike Kutlu — Tue, 11 Aug 2026 00:00:00 GMT

Device-bound sessions tie an authenticated session to the device that created it, so a stolen token replayed from another device is rejected.

What is CTEM? Continuous Threat Exposure Management explained

Mike Kutlu — Tue, 11 Aug 2026 00:00:00 GMT

CTEM is a continuous security framework for discovering, prioritizing, and validating exposures across your attack surface, including the browser layer.

How to detect bots on your website in 2026

Mike Kutlu — Mon, 10 Aug 2026 00:00:00 GMT

Detecting bots in 2026 means combining network, browser, and behavioral signals into one verdict that also flags AI agents like OpenAI Operator.

What is device fingerprinting? The definitive 2026 guide

Mike Kutlu — Mon, 10 Aug 2026 00:00:00 GMT

Device fingerprinting identifies a device from 250+ browser, hardware and network signals that survive cookie-clearing, incognito mode and VPN use.

Fraud prevention software: full platforms vs signal layers explained

Mike Kutlu — Fri, 07 Aug 2026 00:00:00 GMT

Fraud prevention software splits into transaction scoring platforms and browser-layer signal providers. Here is how each fits your fraud stack.

Password sharing detection tools for SaaS: what works and what doesn't

Mike Kutlu — Fri, 07 Aug 2026 00:00:00 GMT

Device fingerprinting catches colleagues sharing one SaaS login across multiple desktops, the abuse that IP-based and authentication-only tools miss.

What is account takeover fraud? Definition, mechanics, and prevention

Mike Kutlu — Fri, 07 Aug 2026 00:00:00 GMT

Account takeover fraud uses stolen credentials to hijack real accounts. Learn how credential stuffing attacks work and how to detect them at login.

8 best FingerprintJS alternatives in 2026, cside compared

Mike Kutlu — Thu, 06 Aug 2026 00:00:00 GMT

Looking for a FingerprintJS alternative? Compare the 8 best options for 2026, ranked, with cside first for device ID plus AI agent and VPN detection.

iGaming fraud prevention: AI agents, ATO, and PCI compliance

Mike Kutlu — Thu, 06 Aug 2026 00:00:00 GMT

iGaming fraud prevention spans AI agent promo abuse, account takeover on player accounts, and PCI DSS 4.0.1 script monitoring on deposit pages.

How to block AI agents on your website: a practical implementation guide

Mike Kutlu — Wed, 05 Aug 2026 00:00:00 GMT

AI agents pass WAF and CDN filters because they run in real browsers. Blocking them takes a browser-layer script that reads signals inside the session.

How to dispute a chargeback as a merchant: evidence and process guide

Mike Kutlu — Wed, 05 Aug 2026 00:00:00 GMT

Disputing a chargeback means filing a representment package before your card network deadline, backed by delivery proof and device evidence.

What is a fraud detection API? How it works and what to look for

Mike Kutlu — Tue, 04 Aug 2026 00:00:00 GMT

A fraud detection API returns a device fingerprint, AI agent flag, VPN status, and risk score in real time before a login or checkout completes.

Multi-accounting detection software: stop bonus abuse and referral fraud

Mike Kutlu — Tue, 04 Aug 2026 00:00:00 GMT

Multi-accounting detection software links accounts to the same device fingerprint, catching bonus abuse and referral fraud before payouts go out.

Device fingerprinting solutions: how they work and what to look for

Mike Kutlu — Mon, 03 Aug 2026 00:00:00 GMT

How device fingerprinting solutions identify devices with browser, hardware and network signals that survive cookie-clearing, incognito and VPN use.

iGaming fraud detection: bonus abuse, ATO, and PCI compliance in 2026

Mike Kutlu — Mon, 03 Aug 2026 00:00:00 GMT

iGaming fraud spans AI-agent bonus abuse, wallet account takeover, VPN multi-accounting, and deposit-page skimming. Here is how to detect each one.

PCI DSS compliance cost in 2026: what you will actually pay

Mike Kutlu — Mon, 03 Aug 2026 00:00:00 GMT

PCI DSS compliance cost runs from about $5,000 a year for small merchants to over $5 million for enterprises, and automation cuts the biggest drivers.

Bot protection in 2026: why browser-layer detection catches what WAFs miss

Mike Kutlu — Fri, 31 Jul 2026 00:00:00 GMT

AI agents run inside real Chromium browsers and slip past WAFs. Browser-layer detection reads canvas entropy and session cadence to catch them.

Chargeback fraud prevention: how device evidence wins disputes in 2026

Mike Kutlu — Fri, 31 Jul 2026 00:00:00 GMT

Chargeback fraud prevention hinges on device evidence captured at checkout, the proof Visa CE 3.0 accepts when you contest a card-not-present dispute.

Account takeover solutions: understanding the category before you build a shortlist

Mike Kutlu — Thu, 30 Jul 2026 00:00:00 GMT

Account takeover solutions span four layers: WAF, MFA, browser device intelligence, and behavioral analytics. No single vendor covers them all.

Best account sharing detection software 2026: an honest comparison

Mike Kutlu — Thu, 30 Jul 2026 00:00:00 GMT

Device fingerprinting counts how many distinct devices sit behind one login, catching the seat abuse that IP-based tools and MFA controls miss.

Fake account detection: why email verification is not enough in 2026

Mike Kutlu — Thu, 30 Jul 2026 00:00:00 GMT

Email verification and CAPTCHA confirm an endpoint, not a person. Device fingerprinting is what catches fake account signups at registration.

Best VPN detection software 2026: TLS handshake fingerprint TLS fingerprinting vs IP blocklists

Mike Kutlu — Wed, 29 Jul 2026 00:00:00 GMT

The best VPN detection tools use TLS handshake fingerprint TLS fingerprinting to catch the residential proxies and VPN configurations that IP blocklists miss entirely.

PCI DSS compliance checklist 2026: Requirements 6.4.3 and 11.6.1 explained

Mike Kutlu — Wed, 29 Jul 2026 00:00:00 GMT

Requirements 6.4.3 and 11.6.1 became mandatory in March 2025. Here is what belongs on a modern PCI DSS compliance checklist, and how to automate it.

Card testing fraud prevention software: how to stop automated card validation at checkout

Mike Kutlu — Tue, 28 Jul 2026 00:00:00 GMT

See how browser-layer detection stops automated card testing at checkout using session behavior, AI agent signals, and device fingerprinting.

What is formjacking? How it works and how to detect it

Mike Kutlu — Tue, 28 Jul 2026 00:00:00 GMT

Formjacking injects malicious JavaScript into checkout pages to steal card data as it is typed, invisible to WAFs and CSPs. Here is how to detect it.

What is credential stuffing? Definition, examples, and detection

Mike Kutlu — Tue, 28 Jul 2026 00:00:00 GMT

Credential stuffing tests stolen username and password pairs from breaches against other sites. Learn how it works and how device signals catch it.

Account sharing detection: how to identify seat abuse before it costs you revenue

Mike Kutlu — Mon, 27 Jul 2026 00:00:00 GMT

Account sharing detection spots when several people share one login. See how device fingerprinting flags seat abuse without adding user friction.

Best bot detection and management software in 2026: 6 tools

Mike Kutlu — Mon, 27 Jul 2026 00:00:00 GMT

Compare six bot detection and management tools for 2026 by detection layer, from network-edge bot mitigation to browser-layer AI agent detection.

How to get the browser time zone in JavaScript (2026 guide)

Mike Kutlu — Mon, 27 Jul 2026 00:00:00 GMT

Get the browser time zone in JavaScript with one line of Intl code, read the UTC offset, handle DST, and use the zone as a fraud signal.

Browser Fingerprint Spoofing: How Attackers Bypass Detection and How to Stop Them

Simon Wijckmans — Sun, 26 Jul 2026 00:00:00 GMT

How attackers spoof browser fingerprints to evade fraud detection, and why layered signals catch what canvas-and-UA spoofing cannot.

Applicant fraud detection software: identifying fake job applicants before they are hired

Mike Kutlu — Fri, 24 Jul 2026 00:00:00 GMT

Applicant fraud detection software flags fake job applicants by analyzing device, network, and location signals during the application session.

Bank fraud prevention software: how browser-layer signals close the detection gap

Mike Kutlu — Fri, 24 Jul 2026 00:00:00 GMT

Bank fraud prevention software must catch account takeover, new account fraud and synthetic identity fraud, and each vector leaves a browser-layer signal.

How to comply with PCI DSS 4.0.1 Requirement 6.4.3: a practical checklist

Mike Kutlu — Fri, 24 Jul 2026 00:00:00 GMT

PCI DSS 6.4.3 requires a full inventory of every payment page script, with authorization, justification, and integrity controls for each one.

Best Magecart protection software 2026: script integrity on payment pages

Mike Kutlu — Thu, 23 Jul 2026 00:00:00 GMT

Compare the best Magecart protection software for 2026, and see how real-time script monitoring meets PCI DSS 4.0.1 Requirements 6.4.3 and 11.6.1.

Best privacy monitoring software 2026: beyond cookie consent

Mike Kutlu — Thu, 23 Jul 2026 00:00:00 GMT

The best privacy monitoring software watches what third-party scripts actually do in the browser at runtime, not just which cookies a page sets.

How to detect and prevent credential stuffing in 2026: three signals that actually work

Mike Kutlu — Thu, 23 Jul 2026 00:00:00 GMT

Detect and prevent credential stuffing with three signals that survive IP rotation: cross-account device reuse, new-device logins, and proxy detection.

Account takeover fraud detection: how browser-layer signals catch ATO before login

Mike Kutlu — Wed, 22 Jul 2026 00:00:00 GMT

Browser-layer signals flag attacker sessions before login completes, catching credential-stuffing attempts before any account is compromised.

AI agent security: why traditional bot detection cannot see the new threat

Mike Kutlu — Wed, 22 Jul 2026 00:00:00 GMT

Autonomous AI agents run inside real browsers and slip past WAFs and CDN bot filters. Here is how browser-layer signals catch them per session.

The 8 best CAPTCHA alternatives in 2026

Mike Kutlu — Wed, 22 Jul 2026 00:00:00 GMT

CAPTCHAs are dead, and bots solve them faster than humans in 2026. Here are the eight replacements web teams actually deploy, ranked by user friction and bot resistance.

Best chargeback evidence software 2026: win more disputes with session-level proof

Mike Kutlu — Wed, 22 Jul 2026 00:00:00 GMT

Chargeback evidence software captures device fingerprint and session behavior at checkout, so merchants can prove what happened when disputes land.

Best Chargeback Software: 10 Prevention Platforms for 2026

Mike Kutlu — Wed, 22 Jul 2026 00:00:00 GMT

Chargeback prevention software stops disputes before they reach your acquirer. Ranked by VAMP fit and evidence quality: the 10 platforms for 2026.

The 10 best fraud detection software platforms in 2026

Mike Kutlu — Wed, 22 Jul 2026 00:00:00 GMT

The fraud detection software fraud teams actually pick in 2026, ranked by browser-layer evidence, explainability, and false-positive economics.

The 10 best payment fraud detection software platforms in 2026

Mike Kutlu — Wed, 22 Jul 2026 00:00:00 GMT

The payment fraud detection tools merchants actually pick in 2026, ranked by checkout evidence, Visa CE 3.0 support, and false-positive economics.

The 10 best transaction monitoring software platforms in 2026

Mike Kutlu — Wed, 22 Jul 2026 00:00:00 GMT

The transaction monitoring tools compliance and fraud teams pick in 2026, ranked by AML fit, alert quality, and false-positive economics.

Inside a Live, Real-Time Google Credential-Phishing Kit: Fake CAPTCHA, Blob URLs and Encrypted WebSockets

Taym Haddadi — Wed, 22 Jul 2026 00:00:00 GMT

A technical investigation of a live Google credential-phishing kit using fake CAPTCHA, blob URLs, remote-browser streaming and encrypted WebSockets.

Cookie Theft and Session Hijacking: How Attackers Steal Sessions and How to Stop Them

Simon Wijckmans — Tue, 21 Jul 2026 00:00:00 GMT

Cookie theft is when an attacker captures a session token from a logged-in user and replays it to impersonate them. No password needed, no MFA prompt. Here is how the attack works and how to stop it.

Magento PCI Compliance: Meeting PCI DSS 4.0.1 on Magento Stores

Simon Wijckmans — Tue, 21 Jul 2026 00:00:00 GMT

Magento merchants are not automatically PCI DSS compliant. Here is what Requirements 6.4.3 and 11.6.1 demand, what ASV scans miss, and how to close the client-side gap.

Consent Management Monitoring: Prove Your Cookie Consent Is Actually Enforced

Juan Combariza — Mon, 20 Jul 2026 00:00:00 GMT

A CMP records what visitors agreed to. It does not stop trackers from ignoring those choices. Here is how browser-layer monitoring closes the gap.

What Is Price Scraping and How to Stop It (2026)

Simon Wijckmans — Mon, 20 Jul 2026 00:00:00 GMT

Price scrapers harvest your catalog prices in real time, feeding competitor repricing engines. IP blocks and CAPTCHAs fail. Browser-layer behavioral detection does not.

Homoglyph attacks in 2026: аpple.com is not apple.com (and how to actually detect the difference)

Mike Kutlu — Sun, 19 Jul 2026 00:00:00 GMT

Homoglyph attacks use visually identical Unicode characters to register lookalike domains for phishing and script injection. Here is how they work, why browsers stopped protecting you, and what actually detects them.

TLS fingerprinting in 2026: what the ClientHello reveals (and where the signal fails)

Mike Kutlu — Sun, 19 Jul 2026 00:00:00 GMT

TLS fingerprinting identifies the client library from the ClientHello handshake, before a single byte of HTTP is decrypted. Here is what it catches, what it misses, and where it belongs in a full detection stack.

8 types of credit card fraud your CS team will see in 2026 (and how to spot each one)

Mike Kutlu — Sun, 19 Jul 2026 00:00:00 GMT

The 8 credit card fraud patterns your CS and fraud teams will see in 2026, with the concrete signal that separates each one from a legitimate transaction.

Credential Harvesting: How Attackers Steal Passwords in 2026

Mike Kutlu — Sun, 19 Jul 2026 00:00:00 GMT

Credential harvesting has moved from bulk phishing to session cookie theft, Evilginx style MFA bypass, and third party script injection at login. Here is how detection actually works.

What is cside? Browser-layer visibility for every visitor, human or agentic

Simon Wijckmans — Sun, 19 Jul 2026 00:00:00 GMT

cside is a browser-layer platform that gives security, fraud, privacy, and compliance teams visibility into what runs in every visitor's browser, human or agentic.

Friendly fraud in 2026: why the customer wins the chargeback (and how to actually fight back)

Mike Kutlu — Sun, 19 Jul 2026 00:00:00 GMT

Friendly fraud is not fraud in the traditional sense. It is a legitimate cardholder disputing a charge they actually made. Here is why most merchants lose these disputes and what CE 3.0 evidence changes.

New Account Fraud: What It Is, the Main Types, and How Detection Works

Mike Kutlu — Sat, 18 Jul 2026 00:00:00 GMT

New account fraud (NAF) is fraud committed using a newly opened account. It comes in three forms, synthetic identity fraud, genuine identity manipulation, and fake account creation, each exploiting a different gap in standard registration controls.

What Is a Laptop Farm? How Fraud Operators Scale Human-Like Attacks

Simon Wijckmans — Sat, 18 Jul 2026 00:00:00 GMT

A laptop farm is a physical setup where operators run multiple devices under separate identities to simulate distinct users. Learn how they work and how browser signals expose them.

What Is Formjacking? How the Attack Works and How to Stop It

Simon Wijckmans — Sat, 18 Jul 2026 00:00:00 GMT

Formjacking is a client-side attack that injects JavaScript to capture payment and login data as users type. Learn how the attack works, why traditional tools miss it, and how to detect it.

How to Detect AI Agents and Stealth Browsers: The Signals That Give Them Away

Simon Wijckmans — Wed, 15 Jul 2026 00:00:00 GMT

A signal-by-signal guide to detecting stealth and anti-detect browsers: CDP and webdriver tells, headless quirks, font and WebGL drift, and behavior.

Does Shopify Make You PCI Compliant? What 6.4.3 & 11.6.1 Still Require

Simon Wijckmans — Wed, 15 Jul 2026 00:00:00 GMT

Shopify is a PCI DSS Level 1 service provider, but that certifies Shopify's own systems, not your storefront. Requirements 6.4.3 and 11.6.1 stay yours.

Ecommerce Fraud Prevention Software: 10 Best Platforms 2026

Simon Wijckmans — Wed, 15 Jul 2026 00:00:00 GMT

10 best ecommerce fraud prevention software platforms for 2026, scored on browser-layer evidence, false-positive cost, and PCI DSS 4.0.1 coverage.

Bot Detection in the Age of AI Agents: Why Legacy Tools Miss Them

Simon Wijckmans — Tue, 14 Jul 2026 00:00:00 GMT

Edge bot tools score IPs, user agents, and rate. AI agents beat each. A gap-by-gap look at where legacy detection breaks and what browser signals add.

Detect AI agents by behavior: mouse, scroll, typing

Simon Wijckmans — Tue, 14 Jul 2026 00:00:00 GMT

Behavioral signals catch AI agents that pass CAPTCHA and rotate IPs: mouse paths and keystroke timing automation can't fake. See how cside scores it.

How to Detect Account Takeover Before It Happens: Browser and Device Signals

Simon Wijckmans — Tue, 14 Jul 2026 00:00:00 GMT

Instrument browser and device signals that fire before account takeover: fingerprint drift, headless and stealth-browser tells, proxy, and velocity.

PCI DSS Requirement 11.6.1 Explained

Simon Wijckmans — Tue, 14 Jul 2026 00:00:00 GMT

What PCI DSS Requirement 11.6.1 mandates for payment page tamper detection: the control text, the 2025-03-31 deadline, and the evidence a QSA expects.

Browser-Layer Script Activity Logging and Incident Response: Complete Guide for 2026

Simon Wijckmans — Mon, 13 Jul 2026 00:00:00 GMT

SIEM and EDR tools log the endpoint. WAFs log the network. Neither logs what third-party scripts do inside your users' browsers. This guide covers what browser-layer script activity logging captures and how incident response works when a script on your site is compromised.

Magecart Attacks Explained: How Web Skimming Works in the Browser

Simon Wijckmans — Mon, 13 Jul 2026 00:00:00 GMT

A plain explainer of how Magecart web skimming works: how the code gets in, how it reads your form fields, and how it exfiltrates card data unseen.

10 Best Bot Detection Tools for 2026 (Including AI Agents)

Simon Wijckmans — Sun, 12 Jul 2026 00:00:00 GMT

The 10 best bot detection tools for 2026, ranked by detection layer, AI agent coverage, and false-positive rate. Head-to-head comparison of edge, device, and browser signals.

JavaScript Security Vulnerabilities: How Obfuscated Scripts Evade CSP and How to Stop Them

Simon Wijckmans — Sun, 12 Jul 2026 00:00:00 GMT

Why CSP cannot stop obfuscated JavaScript attacks, and what browser-layer behavioral monitoring adds that source allowlists cannot.

AI Agent and Bot Detection: Telling Humans, Good Bots, and Malicious Agents Apart

Simon Wijckmans — Sat, 11 Jul 2026 00:00:00 GMT

A classification taxonomy and intent-based enforcement model for separating humans, good bots, and malicious agents, then deciding what each one gets.

How AI Agents Break Account Security and How to Detect Bot-Driven ATO

Simon Wijckmans — Sat, 11 Jul 2026 00:00:00 GMT

How AI agents drive account takeover through credential replay, session and token reuse, and recovery abuse, and the browser signals that expose them.

Adyen and PCI DSS: What the Processor Covers vs. What You Must Do

Simon Wijckmans — Fri, 10 Jul 2026 00:00:00 GMT

Map the PCI DSS 6.4.3 and 11.6.1 script-ownership boundary to each Adyen integration: Hosted Pages, Drop-in, Components, and API-only checkout flows.

Formjacking vs Magecart vs Digital Skimming: What's the Difference?

Simon Wijckmans — Fri, 10 Jul 2026 00:00:00 GMT

Digital skimming is the data-theft outcome, formjacking is the capture technique, and Magecart is the threat-actor ecosystem. Here is how they relate.

How to detect multi-account fraud in fintech and SaaS: device fingerprinting beyond velocity limits

Mike Kutlu — Fri, 10 Jul 2026 00:00:00 GMT

Velocity rules catch the obvious multi-account operator. Device fingerprinting catches the one who rotates email providers and IPs.

Third-Party Script Risk Management: A Governance Framework

Simon Wijckmans — Fri, 10 Jul 2026 00:00:00 GMT

A governance framework for third-party script risk: inventory, ownership, data tiers, change monitoring, review cadence, RACI, and audit evidence.

Credential Stuffing: How to Detect and Stop It at the Login

Simon Wijckmans — Thu, 09 Jul 2026 00:00:00 GMT

Credential stuffing tests breached username and password pairs at scale. Learn the login signals that expose it and the layered controls that stop it.

Does Stripe Make You PCI Compliant? What PCI DSS 6.4.3 & 11.6.1 Still Require

Simon Wijckmans — Thu, 09 Jul 2026 00:00:00 GMT

Stripe shrinks your PCI DSS scope and can move you to SAQ A, but it does not make your site fully compliant. Requirements 6.4.3 and 11.6.1 stay yours.

How to Block AI Content Scrapers on Your Website

Mike Kutlu — Thu, 09 Jul 2026 00:00:00 GMT

AI scrapers harvest pricing, product data, and content at scale. Learn the signal stack that exposes them, and protect data without blocking users.

How to convert account sharers into paying customers

Mike Kutlu — Thu, 09 Jul 2026 00:00:00 GMT

Account sharers are not adversaries. They are unconverted customers who already chose your product.

How to build chargeback evidence that wins disputes: what risk scores and visitor IDs actually prove

Mike Kutlu — Wed, 08 Jul 2026 00:00:00 GMT

A risk score is a model's opinion about a transaction. A visitor ID is a pseudonymous identifier.

Top Platforms for Detecting Autonomous AI Activity on the Web

Mike Kutlu — Wed, 08 Jul 2026 00:00:00 GMT

Compare the top platforms for detecting autonomous, undeclared AI agents that browse real browser sessions with no user-agent on your live website.

What Is Online Card Skimming? How Attackers Steal Payment Card Data from Websites

Simon Wijckmans — Wed, 08 Jul 2026 00:00:00 GMT

Malicious JavaScript on checkout pages captures card numbers before encryption. How online card skimming works, real examples, and PCI DSS 4.0.1 requirements.

How to prevent account takeover: detecting credential attacks before they reach login

Mike Kutlu — Tue, 07 Jul 2026 00:00:00 GMT

Risk engines and visitor IDs fire at the login event. The browser layer sees the attack setup before authentication starts.

Bot Detection Software for 2026: 12 Platforms Compared

Mike Kutlu — Tue, 07 Jul 2026 00:00:00 GMT

Legacy bot detection and AI agent detection are not the same job. Compare which platforms cover each, by detection layer, intent, and agent trust now.

Account sharing vs account takeover: what's the difference and why both cost you revenue

Mike Kutlu — Mon, 06 Jul 2026 00:00:00 GMT

Account sharing and account takeover produce similar session signals but require completely different responses.

AI Agent Traffic Monitoring Tools for Enterprise

Mike Kutlu — Mon, 06 Jul 2026 00:00:00 GMT

How enterprise CISOs monitor, report on, and govern AI agent traffic at scale: platform comparison, browser vs network layer, SIEM, procurement.

Headless Browser Detection: Signals, Methods, and What Works in 2026

Avneh Bhatia — Mon, 06 Jul 2026 00:00:00 GMT

Headless browsers power most bot attacks in 2026. Which signals catch them, why simple checks fail against stealth tooling, and what holds.

How much revenue are you losing to account sharing? Benchmarks and calculation framework

Mike Kutlu — Sun, 05 Jul 2026 00:00:00 GMT

Account sharing revenue loss is calculable.

How to stop account sharing on streaming and OTT platforms

Mike Kutlu — Sat, 04 Jul 2026 00:00:00 GMT

Password sharing enforcement on streaming platforms has become a mainstream conversation since Netflix's crackdown.

What Is Impossible Travel Detection and How Does It Work?

Simon Wijckmans — Sat, 04 Jul 2026 00:00:00 GMT

Impossible travel detection flags sessions where location jumps faster than physically possible. Learn how it works and what the browser layer adds.

How to prevent account sharing in SaaS: device fingerprinting vs session controls vs concurrent limits

Mike Kutlu — Fri, 03 Jul 2026 00:00:00 GMT

Every shared SaaS seat is lost ARR. Session controls slow the leak; device fingerprint history closes it.

How to stop account sharing on online learning platforms: detecting credential sharing without blocking enrolled students

Mike Kutlu — Thu, 02 Jul 2026 00:00:00 GMT

Online learning platforms see high rates of credential sharing driven by cost sensitivity. Concurrent session limits miss the most common pattern.

How to bypass Reddit bot detection (and where behavioral defense still holds)

Avneh Bhatia — Thu, 02 Jul 2026 00:00:00 GMT

We built human_nav, an RL tool that moves like a hand to stress-test behavioral bot detection. Learned motion beats geometry, not a moving detector.

Which Client-Side Security Tools Give Real-Time Browser Attack Visibility?

Mike Kutlu — Thu, 02 Jul 2026 00:00:00 GMT

Real-time browser attack visibility needs session monitoring, behavioural deviation detection, and sub-minute change detection. Six tools evaluated.

How to stop account sharing in hotel loyalty programmes: detecting credential misuse without blocking family accounts

Mike Kutlu — Wed, 01 Jul 2026 00:00:00 GMT

Hotel loyalty programmes lose points revenue and status benefit value to three distinct sharing patterns.

Catching Playwright and browserless bots by how the cursor moves

Avneh Bhatia — Wed, 01 Jul 2026 00:00:00 GMT

Real catch rates on Playwright-driven mouse movement and browserless.io's humanlike API, caught on desktop from cursor motion alone.

Account sharing prevention in healthcare: protecting patient portal credentials and HIPAA compliance

Mike Kutlu — Tue, 30 Jun 2026 00:00:00 GMT

Healthcare credential sharing is not a revenue problem. It is a compliance problem.

Best Client-Side Monitoring Platforms for Fintech in 2026

Mike Kutlu — Tue, 30 Jun 2026 00:00:00 GMT

Fintech faces PCI DSS 4.0.1, GDPR, and financial PII risks general client-side security tools are not built for. Five platforms reviewed for 2026.

How to enforce device limits without cookies: GDPR-compliant account sharing prevention

Mike Kutlu — Mon, 29 Jun 2026 00:00:00 GMT

Cookie-based device tracking fails under GDPR and fails in private browsing.

Script Monitoring for Websites: 5 Best Platforms Compared

Mike Kutlu — Mon, 29 Jun 2026 00:00:00 GMT

Script monitoring detects third-party script behaviour in real browser sessions. Platforms compared on coverage, baselining, and PCI DSS evidence.

How to stop account sharing on gaming platforms: detecting boosting services and account selling without flagging households

Mike Kutlu — Sun, 28 Jun 2026 00:00:00 GMT

Account sharing in gaming takes three distinct forms: boosting, account selling, and household access. Device fingerprint history tells them apart.

Client-Side Security for eCommerce and Fintech: Top Platforms in 2026

Mike Kutlu — Sun, 28 Jun 2026 00:00:00 GMT

eCommerce and fintech sites face Magecart skimming and PCI DSS 4.0.1. Five client-side security platforms reviewed for payment-page script protection.

Why Sampling-Based Security Tools Miss Runtime Attacks on Gambling Platforms

Mike Kutlu — Sun, 28 Jun 2026 00:00:00 GMT

Sampling tools watch under 10% of sessions, so geo-targeted and VIP attacks built to hit the unmonitored 90% pass clean audits while running live.

How to stop account sharing on ecommerce platforms: detecting shared memberships without blocking household shoppers

Mike Kutlu — Sat, 27 Jun 2026 00:00:00 GMT

Ecommerce account sharing takes three distinct forms: subscription, loyalty, and business account sharing, each with its own detection signature.

How to Detect and Block Unknown AI Agents on Your Website

Mike Kutlu — Sat, 27 Jun 2026 00:00:00 GMT

Unknown AI agents have no user-agent and ignore robots.txt. Learn the browser-layer signals that reveal undeclared agents and how to act on them.

UK Gambling Commission Licence Conditions and Third-Party Script Security: What Operators Need to Know

Mike Kutlu — Sat, 27 Jun 2026 00:00:00 GMT

UKGC LCCP compliance requires a secure technical environment. Third-party scripts that redirect players or exfiltrate data create direct exposure.

Account sharing in B2B SaaS: how to enforce seat-based licensing without blocking legitimate teams

Mike Kutlu — Fri, 26 Jun 2026 00:00:00 GMT

B2B SaaS seat sharing is the most under-detected form of credential abuse.

How to Block Playwright Automation on Your Website

Mike Kutlu — Fri, 26 Jun 2026 00:00:00 GMT

Playwright runs real browsers that look identical to humans at the network layer. Here is how to detect it, and why robots.txt and IP blocks all fail.

Supply chain attack examples: Polymarket, Ledger ConnectKit, and polyfill.io

Simon Wijckmans — Fri, 26 Jun 2026 00:00:00 GMT

Real-world supply chain attack examples from Polymarket, Ledger ConnectKit, polyfill.io, and AppsFlyer, covering what they share and why standard defenses miss them.

Shadow Tracking Pixels on Gambling Sites: The GDPR and Advertising Compliance Problem Operators Cannot See

Mike Kutlu — Fri, 26 Jun 2026 00:00:00 GMT

Unauthorised Facebook, TikTok, or LinkedIn pixels on gambling sites trigger simultaneous GDPR and ad-platform liability. Here's why.

How to stop account sharing in airline loyalty programmes: detecting credential misuse without flagging frequent flyers

Mike Kutlu — Thu, 25 Jun 2026 00:00:00 GMT

Frequent flyer accounts are shared in three distinct patterns, each with different revenue and compliance implications.

How to Block PerplexityBot on Your Website

Mike Kutlu — Thu, 25 Jun 2026 00:00:00 GMT

PerplexityBot crawls your content for AI search results. Learn how to block it, why it faced copyright criticism, and how Perplexity Shopper differs.

Shadow GTM Containers on Multi-Brand Gambling Platforms: What They Are and How to Detect Them

Mike Kutlu — Thu, 25 Jun 2026 00:00:00 GMT

Unauthorised GTM containers can run any JavaScript on your gambling domains. How shadow containers appear, what they do, and why tools miss them.

How to detect and prevent account sharing without hurting legitimate users

Mike Kutlu — Wed, 24 Jun 2026 00:00:00 GMT

The biggest objection to account sharing detection is false positives: what if we flag a subscriber who is just using multiple devices?

How to Block GPTBot (and Why You Might Not Want To)

Mike Kutlu — Wed, 24 Jun 2026 00:00:00 GMT

GPTBot crawls your site to train OpenAI models. Here is how to block it with robots.txt and IP ranges, plus what that block still leaves uncovered.

Session Recording Tools on Gambling Sites: The PII Exfiltration Risk Operators Are Missing

Mike Kutlu — Wed, 24 Jun 2026 00:00:00 GMT

Session recording tools on gambling sites can silently exfiltrate player PII when misconfigured or compromised. Here are the three ways it happens.

Account sharing detection: how to close the enforcement gap that concurrent session limits miss

Mike Kutlu — Tue, 23 Jun 2026 00:00:00 GMT

Concurrent session limits flag the obvious case. They do not distinguish between a single user on two devices and two people sharing one account.

Catching bots by the way they move: behavioral cursor detection

Avneh Bhatia — Tue, 23 Jun 2026 00:00:00 GMT

How cside's cursor_v2 model scores mouse movement to catch the stealth bots that already beat fingerprint and IP checks.

How to Block Applebot-Extended on Your Website

Mike Kutlu — Tue, 23 Jun 2026 00:00:00 GMT

Applebot-Extended is Apple's AI training crawler that feeds Apple Intelligence. Learn how it differs from Applebot and how to opt out via robots.txt.

How to Monitor Third-Party Scripts Across 100 or More Casino Domains

Mike Kutlu — Tue, 23 Jun 2026 00:00:00 GMT

A practical guide to monitoring third-party scripts across 100-plus casino domains: script sprawl, cross-domain alerts, and scaling cside.

NJDPA: Guide to Requirements + Website Compliance

Juan Combariza — Tue, 23 Jun 2026 00:00:00 GMT

Get a clear breakdown of the New Jersey Data Privacy Act rules, enforcement timelines, and how to manage third-party scripts for compliance.

Agentic AI Security Risks for Websites: Privacy, Compliance, and Detection

Simon Wijckmans — Mon, 22 Jun 2026 00:00:00 GMT

Agentic AI browsers bypass cookie consent, execute real JavaScript, and create GDPR compliance gaps that CDN-level bot detection cannot see.

Catching bots that don't want to be caught: inside a two-stage neural detection stack

Avneh Bhatia — Mon, 22 Jun 2026 00:00:00 GMT

How a two-stage neural stack catches stealth browsers, proxied scrapers, and LLM agents that pass every fingerprint check, and where it hits a wall.

How to Block DeepSeekBot on Your Website

Mike Kutlu — Mon, 22 Jun 2026 00:00:00 GMT

DeepSeekBot crawls your site for a Chinese AI company. Learn how to block it with robots.txt, IP rules, and the real data sovereignty risks it raises.

Malta Gaming Authority Compliance and Client-Side Script Security: What MGA-Licensed Operators Need to Cover

Mike Kutlu — Mon, 22 Jun 2026 00:00:00 GMT

MGA rules require a secure, auditable platform. Third-party JavaScript on licensed sites is a compliance gap most operators have not audited.

Third-Party Script Attacks on iGaming Platforms in 2026: The New Attack Surface Operators Are Missing

Mike Kutlu — Sun, 21 Jun 2026 00:00:00 GMT

Third-party JavaScript is the primary unmonitored attack surface on iGaming platforms. The seven attack classes, and why standard tools miss them.

GDPR and Online Gambling: Why Unauthorised Pixels Create a Dual Liability Problem

Mike Kutlu — Sat, 20 Jun 2026 00:00:00 GMT

Unauthorised pixels on gambling sites trigger GDPR liability and ad-account bans at once, even when the operator never installed them. Here's why.

HIPAA Website Tracking Compliance: The Healthcare Guide to Third-Party Scripts

Simon Wijckmans — Sat, 20 Jun 2026 00:00:00 GMT

HHS OCR ruled that tracking pixels and third-party scripts on healthcare websites can expose PHI. Here's what covered entities must do to comply.

How to Block Bytespider (TikTok's AI Crawler)

Mike Kutlu — Sat, 20 Jun 2026 00:00:00 GMT

Bytespider crawls your site for Bytedance's AI systems. Learn how to block it with robots.txt and IP ranges, and the data sovereignty concerns.

How Malicious Scripts Hijack Casino Player Journeys

Mike Kutlu — Fri, 19 Jun 2026 00:00:00 GMT

Script-injected redirects divert casino players before they reach the lobby. Network tools miss them entirely. Here's how detection must work.

Client-Side Script Security for APAC Online Gambling Operators

Mike Kutlu — Fri, 19 Jun 2026 00:00:00 GMT

How APAC online gambling operators in Japan, Singapore, the Philippines, and Australia can monitor third-party scripts across real player sessions.

How to Block Amazon Buy for Me on Your Website

Mike Kutlu — Fri, 19 Jun 2026 00:00:00 GMT

Amazon Buy for Me shops your site for Prime users. Learn how it collects pricing and product data and how browser-layer detection gives you control.

How Compromised Affiliate Scripts Steal Online Casino Revenue

Mike Kutlu — Thu, 18 Jun 2026 00:00:00 GMT

Compromised affiliate scripts redirect players, steal commissions, and manipulate UTM attribution on casino pages, silently and at scale.

How Browser Extensions Attack Online Casino Players: What Operators Can Do About It

Mike Kutlu — Thu, 18 Jun 2026 00:00:00 GMT

Browser extensions can steal session tokens and hijack payments on casino sites. Here's how they attack, why servers miss it, and how to detect them.

How to Block CCBot (Common Crawl's AI Crawler)

Mike Kutlu — Thu, 18 Jun 2026 00:00:00 GMT

CCBot feeds Common Crawl datasets used to train GPT-3, BLOOM, LLaMA, and many other AI models. Learn how to block it and what blocking actually does.

PCI DSS 6.4.3 Script Inventory and Authorization: How to Build the Record

Simon Wijckmans — Thu, 18 Jun 2026 00:00:00 GMT

The script inventory and authorization workflow for PCI DSS 6.4.3: what fields each record needs, who signs off, and a sample inventory row to copy.

How to Block AI-Powered Fake Account Creation with Signup Shield

Mike Kutlu — Thu, 18 Jun 2026 00:00:00 GMT

AI agents create fake accounts with human-like behaviour that defeats CAPTCHA. Learn the browser-layer signals that reveal automated registrations.

Fixing TLS timeout handling in the cside Edge

Taym Haddadi — Tue, 16 Jun 2026 00:00:00 GMT

How cside improved TLS reliability in the Rust Edge by moving handshake work out of the Axum accept path and into bounded Tokio tasks.

How to Block ClaudeBot on Your Website

Mike Kutlu — Tue, 16 Jun 2026 00:00:00 GMT

ClaudeBot crawls your site to train Anthropic's Claude models. Here is how to block it with robots.txt and IP ranges, and what the block still misses.

How to Prevent Fake Account Creation with cside Signup Shield: Why Browser-Layer Detection Catches What Email Verification Misses

Mike Kutlu — Mon, 15 Jun 2026 00:00:00 GMT

Email verification confirms a mailbox exists. It cannot see the browser. Here is why browser-layer detection catches fake account creation it misses.

Web Supply Chain Attack Explained: The Polyfill.io Incident, Full Timeline & Lessons (2024-2026)

Simon Wijckmans — Sun, 14 Jun 2026 00:00:00 GMT

A web supply chain attack turns trusted third-party code against visitors. See how the Polyfill.io attack hit 490,000+ sites and what it teaches about JavaScript supply chain risk.

How to Block AI Card-Testing Agents

Mike Kutlu — Sat, 13 Jun 2026 00:00:00 GMT

AI card-testing agents probe payment flows using real browsers. Learn the browser signals that expose them before a transaction completes.

How to Choose an AI Agent Detection Solution

Mike Kutlu — Fri, 12 Jun 2026 00:00:00 GMT

A five-step buying guide for CISOs evaluating AI agent detection solutions: architecture, classification, vendor profiles, and POC methodology.

Anti-bot software: how it works and 5 platforms compared

Mike Kutlu — Thu, 11 Jun 2026 00:00:00 GMT

Anti-bot software blocks scrapers, credential stuffers, and AI agents. Five platforms compared on detection layer, intent, and agentic coverage.

How to Block OpenAI Operator on Your Website

Mike Kutlu — Wed, 10 Jun 2026 00:00:00 GMT

OpenAI Operator browses your site like a real user. Learn how to detect and block it using browser-layer signals and when you should not block it.

DBSC vs Device Fingerprinting: What Chrome's Session Security Does Not Cover

Simon Wijckmans — Tue, 09 Jun 2026 00:00:00 GMT

Chrome's DBSC stops stolen-cookie replay, but it is Chrome-only, post-login, and not a device-identity layer. Here is the fraud it leaves open.

How to Block Perplexity Shopper on Your Website

Mike Kutlu — Tue, 09 Jun 2026 00:00:00 GMT

Perplexity Shopper browses and buys from retail websites on behalf of Pro users. Learn how to detect its browser-layer signals and govern the traffic.

AI API security: when shared infrastructure returns another user's data

Simon Wijckmans — Fri, 05 Jun 2026 00:00:00 GMT

Shared caches, connection pools, and request routers make AI API security hard. Here's how cross-tenant response bleed happens and what to monitor in the browser.

MFA Didn't Fail, the Trust Model Did: Device Code Phishing and OAuth Token Theft (Kali365)

Simon Wijckmans — Fri, 05 Jun 2026 00:00:00 GMT

Kali365 abuses the OAuth 2.0 device authorization grant to steal Microsoft 365 tokens after MFA. A technical breakdown of the flow, FOCI, and detection.

AI is compressing the exploit cycle: Google's AI-developed zero-day and what it means for browsers

Simon Wijckmans — Wed, 03 Jun 2026 00:00:00 GMT

Google flagged a zero-day it believes was AI-developed. The real AI security shift isn't smarter phishing, it's how fast exploits reach the browser.

The Browser Session Is Now a Security Control Plane. Attackers Knew That Years Ago.

Simon Wijckmans — Sat, 30 May 2026 00:00:00 GMT

Google's DBSC proposal validates a clear security shift: browser sessions need device-aware validation after login, not only MFA.

Account Takeover Prevention Software: 10 Tools for 2026

Mike Kutlu — Wed, 27 May 2026 00:00:00 GMT

Compare account takeover prevention software by defense layer: fingerprinting (cside), fraud suites (Sift), MFA (Okta). Find which layer your stack is missing.

How to Stop AI Agents From Creating Fake Accounts with Signup Shield (Guide)

Juan Combariza — Wed, 20 May 2026 00:00:00 GMT

AI agents create fake accounts using real browsers, residential IPs, and generated identities. Here's the detection signal stack to stop them.

How to Block AI-Agent Based Content Scraping Bots (Guide)

Juan Combariza — Tue, 19 May 2026 00:00:00 GMT

AI content scraping bots use real browsers, residential IPs, and LLM-powered extraction to harvest your pricing and content. Here's how to stop them.

The Snowball Effect: How Mini Shai-Hulud Turns npm into a Worm Distribution Network

Simon Wijckmans — Tue, 19 May 2026 00:00:00 GMT

Mini Shai-Hulud turned npm packages into a credential-theft loop. Here is how the AntV wave spread and what teams should monitor next.

Why CAPTCHAs Are No Longer Reliable Bot Defense

Simon Wijckmans — Tue, 19 May 2026 00:00:00 GMT

CAPTCHAs are no longer a reliable primary bot defense. Learn why visible challenges fail and how resource-wasting defenses raise attacker cost.

Funnull Sanctioned: What the Polyfill[.]io Attack Exposed About Infrastructure Laundering

Simon Wijckmans — Mon, 18 May 2026 00:00:00 GMT

OFAC's Funnull sanctions show why the Polyfill attack was part of a larger infrastructure laundering and browser supply-chain risk.

On-Device Inference Is Coming for Your Security Stack: For Better and Worse

Simon Wijckmans — Mon, 18 May 2026 00:00:00 GMT

On-device AI can protect sensitive data and power endpoint defense, but it also creates new prompt injection, telemetry, and browser attack paths.

4 Tools To Detect AI Agents On Your Website (Fraud Prevention)

Mike Kutlu — Fri, 15 May 2026 00:00:00 GMT

Compare cside, HUMAN Security, DataDome, and Cloudflare for AI agent detection. See how each tool handles fraud prevention, pricing, and implementation.

AI-Agent Based Credit Card Testing Bots | How to Stop Them

Mike Kutlu — Fri, 15 May 2026 00:00:00 GMT

AI credit card testing agents use real browsers to test stolen credentials at scale. Learn how to detect and block them before a transaction completes.

What Are Stealth (or 'Anti-Detect') Browsers and When to Block Them

Mike Kutlu — Thu, 14 May 2026 00:00:00 GMT

Stealth browsers bypass bot detection. Anti-detect browsers spoof fingerprints. Learn the signals that reveal both, even when they look human.

cside Named SourceForge Spring 2026 Top Performer for Client-Side Security

Simon Wijckmans — Wed, 13 May 2026 00:00:00 GMT

cside was named a SourceForge Spring 2026 Top Performer, based on user trust in client-side security, PCI evidence, and support.

How to Detect AI Agents on Your Website | Full Guide

Mike Kutlu — Wed, 13 May 2026 00:00:00 GMT

How to detect AI agent traffic through identity, network, browser, and behavioral signals: free log analysis plus specialized tools.

cside Co-Chairs W3C Anti-Fraud Browser Security

Simon Wijckmans — Tue, 12 May 2026 00:00:00 GMT

Simon Wijckmans now co-chairs W3C AFCG as cside helps shape privacy-preserving browser signals for AI-era fraud.

What Is Mastercard First-Party Trust? How It Reduces Chargebacks

Mike Kutlu — Mon, 11 May 2026 00:00:00 GMT

Mastercard First-Party Trust deflects friendly fraud disputes before they become formal chargebacks. Here is how the evidence framework works.

Mastercard First Party Trust: Improve EFM and ECP Ratios with Device Fingerprinting

Mike Kutlu — Fri, 08 May 2026 00:00:00 GMT

Mastercard's First Party Trust program uses device fingerprinting to deflect friendly fraud disputes before they inflate your EFM and ECP ratios.

PCI DSS 6.4.3 & 11.6.1 Compliance Tools: 2026 Comparison

Mike Kutlu — Thu, 07 May 2026 00:00:00 GMT

Compare PCI DSS 6.4.3 and 11.6.1 compliance tools: features, pricing, and reviews for cside, Feroot, Cloudflare, Reflectiz, and DomDog side by side.

Friendly Fraud in Travel and Hospitality: The 2026 Playbook

Mike Kutlu — Wed, 06 May 2026 00:00:00 GMT

Travel and hospitality merchants face the highest-value friendly fraud disputes. How CE 3.0 and browser-layer evidence rebalance the win rate.

Mastercard Scam Merchant Monitoring: SMMP Enforcement Active, What Merchants Must Do Now

Mike Kutlu — Tue, 05 May 2026 00:00:00 GMT

Mastercard SMMP is 30+ days into active enforcement. Which merchants face investigation risk now, what the 72-hour acquirer window means in practice, and how to close the evidence gap before the next trigger fires.

Utah SB 73: You Are Now Liable for Users' VPNs

Mike Kutlu — Tue, 05 May 2026 00:00:00 GMT

Utah SB 73 holds operators liable when users bypass age gates with VPNs. An IP blocklist cannot keep pace. Behavioural detection is what works.

CE 3.0 Auto-Qualification: What Changed on 17 October 2025 and What To Do Now

Mike Kutlu — Fri, 01 May 2026 00:00:00 GMT

Visa auto-qualifies transactions for Compelling Evidence 3.0 via Visa Secure and Visa Data Only. What changed, who benefits, and the evidence gap.

Friendly Fraud in Gaming and iGaming: The 2026 Chargeback Playbook

Mike Kutlu — Wed, 29 Apr 2026 00:00:00 GMT

iGaming merchants run the highest chargeback ratios of any vertical. VAMP 2026 tightened the line. How CE 3.0 plus browser-layer evidence rebalances the book.

VAMP Thresholds 2026: Ratio Formula, Rules, and Merchant Survival Guide

Mike Kutlu — Wed, 29 Apr 2026 00:00:00 GMT

Visa VAMP thresholds tightened to 1.5% on 1 April 2026: $8-per-transaction fines, no warning tier. How to calculate the VAMP ratio and use CE 3.0.

Compelling Evidence 3.0 Requirements: What Visa Mandates and What Actually Wins the Case

Mike Kutlu — Tue, 28 Apr 2026 00:00:00 GMT

The four data elements Visa requires for CE 3.0, and what separates winning representments from losing ones.

How OpenClaw Agents Bypass Bot Detection (And How to Stop Them)

Simon Wijckmans — Tue, 28 Apr 2026 00:00:00 GMT

OpenClaw agents paired with stealth browser tooling can bypass legacy bot detection. Learn how agentic fraud works and how browser fingerprinting helps stop it.

CTEM at the browser layer: one third-party script, five findings

Mike Kutlu — Mon, 27 Apr 2026 00:00:00 GMT

A live analysis of one Skeepers widget on a major international bank surfaced a 360-day cookie on auth subdomains, a CSP gap, and a server-controlled sub-script. Here's what CTEM looks like applied to the browser layer.

Friendly Fraud in SaaS and Subscription Businesses: The 2026 Playbook

Mike Kutlu — Mon, 27 Apr 2026 00:00:00 GMT

SaaS friendly fraud has its own shape: descriptor drift, recurring billing, CE 3.0 eligibility. Here's how to fight it in 2026.

Best account sharing prevention software: comparing tools for businesses

Juan Combariza — Thu, 23 Apr 2026 00:00:00 GMT

SaaS teams lose revenue to account sharing daily. Compare the best account sharing prevention software by features, pricing, and reviews.

How to prevent account sharing fraud (full guide for businesses)

Juan Combariza — Wed, 22 Apr 2026 00:00:00 GMT

Account sharing costs organizations billions in revenue loss. This guide covers prevention methods like device and session limits, as well as strategic tips.

How to Remove a TC40 from Your VAMP Ratio: The CE 3.0 Mechanic

Mike Kutlu — Tue, 21 Apr 2026 00:00:00 GMT

TC40 fraud reports feed your VAMP ratio without a chargeback. A successful CE 3.0 representment is the only way to remove one. Here's how it works.

7 steps to stop account takeover fraud (for Travel businesses)

Juan Combariza — Sun, 19 Apr 2026 00:00:00 GMT

MFA is bypassed by advanced phishing kits. See the best practices, fingerprint signals, and tools that Travel fraud teams actually use to stop ATO.

Quick guide to prevent Account Takeover fraud (crypto businesses)

Juan Combariza — Fri, 17 Apr 2026 00:00:00 GMT

Crypto accounts are the most valuable ATO target of any industry. See the best practices, fingerprint signals, and tools Crypto teams use to stop ATO.

How Advanced Location Data Prevents Account Takeover and Detects Unsafe AI-Agent Token Reuse

Simon Wijckmans — Wed, 15 Apr 2026 00:00:00 GMT

How advanced location data helps security teams detect impossible travel, stolen-session reuse, and unsafe AI-agent activity before account takeover turns into fraud or data loss.

How Compromised Third-Party Scripts Can Prompt-Inject AI Agents

Simon Wijckmans — Mon, 13 Apr 2026 00:00:00 GMT

Third-party scripts already adapt website behavior by browser characteristics. That same flexibility can be abused to detect AI agents and inject misleading instructions or altered content.

Best methods to prevent account takeover fraud (FinTech)

Juan Combariza — Fri, 10 Apr 2026 00:00:00 GMT

FinTech accounts are targeted daily by attackers. See the best practices, fingerprint signals, and prevention tools FinTech teams use to stop ATO.

Best practices to prevent account takeover fraud (eCommerce)

Juan Combariza — Wed, 08 Apr 2026 00:00:00 GMT

eCommerce accounts are targeted daily by attackers. See the best practices, fingerprint signals, and prevention tools eCom companies use to stop ATO.

Account Takeover Fraud Prevention: The Complete 2026 Guide

Mike Kutlu — Tue, 07 Apr 2026 00:00:00 GMT

MFA helps, but it does not stop account takeover on its own. This guide covers how businesses can prevent ATO early with fingerprinting signals.

Meet cside at RSAC 2026

Juan Combariza — Mon, 23 Mar 2026 00:00:00 GMT

Meet the cside time at RSAC 2026 in San Francisco. Stop by our booth S-0238 on March 24-26 or grab time with us off the floor.

DarkSword: pure JavaScript exploit chain weaponizes legitimate websites

Simon Wijckmans — Fri, 20 Mar 2026 00:00:00 GMT

DarkSword is a full-chain iOS exploit delivered via watering-hole compromises of legitimate websites. It runs entirely in JavaScript, evades binary mitigations, and drops JavaScript-based backdoors that exfiltrate sensitive data.

AppsFlyer Web SDK supply-chain compromise - polymorphic crypto stealer

Simon Wijckmans — Wed, 18 Mar 2026 00:00:00 GMT

A registrar-level DNS hijack of appsflyer.com served a polymorphic crypto-stealing payload through the AppsFlyer Web SDK and affected thousands of sites and some Node.js server environments. This post summarizes telemetry, forensic indicators, IOCs, detection guidance, and remediation steps.

OpenClaw Scanner for Third-Party Scripts

Simon Wijckmans — Wed, 18 Mar 2026 00:00:00 GMT

A free, open-source scanner that inventories third-party scripts, detects fingerprinting, audits security headers and cookies, and flags PCI DSS exposure on payment pages. Run a quick 30-second audit to reveal what code executes in your users' browsers.

Inside Coruna - Web Script IOS Exploit

Simon Wijckmans — Sun, 08 Mar 2026 00:00:00 GMT

Your website could have been used to distribute this iOS exploit kit and you wouldn't have known. A full technical breakdown of Coruna: five exploit chains, 23 CVEs, and the delivery infrastructure that makes every website a potential attack vector.

"Microsoft Clairty" Isn't Microsoft Clarity: Deobfuscating a Typosquatted Ad Fraud Script

Simon Wijckmans — Tue, 03 Mar 2026 00:00:00 GMT

cside observed a new malicious client-side injection originating from a malicious browser extension impersonating Microsoft Clarity and overwriting referral tokens to redirect referral revenue to a malicious actor.

How to Block and Detect AI Agents on Your Website: 4 Methods Compared

Juan Combariza — Tue, 24 Feb 2026 00:00:00 GMT

Compare 4 approaches to blocking and detecting AI agents: robots.txt, server controls, traditional bot detection, and specialized AI agent detection. Find out which ones actually stop fraud.

How to Monitor Cross Border Data Transfer On Your Website | GDPR, CCPA

Juan Combariza — Thu, 12 Feb 2026 00:00:00 GMT

Your website is likely sending personal data to other countries. Learn how to track cross-border data transfers for GDPR and CCPA requirements.

How to Prevent Website Data Breaches (to avoid GDPR & CCPA fines)

Juan Combariza — Fri, 06 Feb 2026 00:00:00 GMT

1/3rd of breaches involve third parties. Learn how to prevent GDPR and CCPA violations by securing third-party scripts, APIs, and data flows.

GDPR Tools 2026: 6 Categories and the Software for Each

Mike Kutlu — Tue, 03 Feb 2026 00:00:00 GMT

No single platform covers GDPR compliance alone. The 6 tool types: consent management, client-side monitoring, DSAR, data mapping, security, and automation.

E-Skimming: How the Attack Works and How to Prevent It (2026)

Mike Kutlu — Thu, 29 Jan 2026 00:00:00 GMT

E-skimming injects code on checkout pages to steal payment data before encryption. How the attack works and what PCI DSS 4.0.1 §6.4.3 requires.

VCDPA: Guide to Requirements + Website Compliance

Juan Combariza — Thu, 22 Jan 2026 00:00:00 GMT

Get a clear breakdown of Virginia Consumer Data Protection Act rules, enforcement timelines, and how to manage third-party scripts correctly.

Third-party script security: best practices for securing third-party scripts on web pages

Simon Wijckmans — Wed, 21 Jan 2026 00:00:00 GMT

Third-party script security best practices to stop Magecart: script inventory, least-privilege access, integrity checks, and runtime monitoring.

Best Client-Side Security Tools for Compliance Reporting & Audits (2026)

Juan Combariza — Tue, 20 Jan 2026 00:00:00 GMT

Compare the best client-side security tools for compliance reporting and audits in 2026, ranked by audit evidence, session coverage, and pricing.

CPA (Colorado Privacy Act): Guide to Requirements + Website Compliance

Mike Kutlu — Fri, 16 Jan 2026 00:00:00 GMT

Get a clear breakdown of Colorado Privacy Act rules, enforcement timelines, and how to manage third-party scripts correctly.

How to detect VPN traffic on your website

Simon Wijckmans — Wed, 14 Jan 2026 00:00:00 GMT

VPN detection in five signals: IP block ownership, JA4 TLS fingerprint, timezone drift, WebRTC, and behavior. IP lists alone miss residential VPNs.

Top AI Tools For Website Privacy Compliance in 2026 (GDPR, CPRA)

Mike Kutlu — Tue, 13 Jan 2026 00:00:00 GMT

Website privacy compliance is getting harder. Fortunately these AI-powered tools automate the heavy lifting across GDPR, CCPA, and HIPAA.

2026 Web Security Predictions from cside's CEO

Simon Wijckmans — Thu, 08 Jan 2026 00:00:00 GMT

2026 will look different from past years. We'll be watching for: deepfake-powered phishing, LLM hallucinated security recommendations, and AI agent attackers.

Does GDPR apply to my U.S. company? (3 step self assessment)

Juan Combariza — Thu, 08 Jan 2026 00:00:00 GMT

GDPR might apply to your website even if you're U.S. based. Use this 3 step checklist to see if you're at risk and the potential for financial penalties.

10 common GDPR website compliance failures (and how to prevent them)

Mike Kutlu — Tue, 30 Dec 2025 00:00:00 GMT

Common GDPR website compliance failures, why your team doesn't notice them on your website, and how to prevent unlawful data collection.

Best client-side security for eCommerce?

Simon Wijckmans — Fri, 26 Dec 2025 00:00:00 GMT

eCommerce sites are heavy consumers of client-side tracking tags which creates a significant risk for malicious exfiltration of sensitive data but also legitimate tags collecting more data than is necessary to sell to data brokers. The cside solution solves these concerns with ease.

GDPR Penalties for Websites: How to Avoid Fines in 2026

Mike Kutlu — Fri, 26 Dec 2025 00:00:00 GMT

Third-party scripts are a fast-growing GDPR enforcement trigger. See fine categories, real enforcement cases, and how to avoid website liability.

Best client-side security for Financial Institutions?

Simon Wijckmans — Wed, 24 Dec 2025 00:00:00 GMT

Nation-state targets like Financial Institutions need to partner with vendors that understand limitations and work to get as close to full coverage as is possible. Read why many choose cside's multi-layer model.

How to comply with GDPR website requirements (2026 guide)

Mike Kutlu — Wed, 24 Dec 2025 00:00:00 GMT

Reducing GDPR risk starts with knowing what embedded third-party scripts collect. The six control areas regulators check, explained for 2026.

CSS Security: Protecting Against CSS-Based Attacks

Mike Kutlu — Tue, 23 Dec 2025 00:00:00 GMT

CSS controls what your users see. This guide covers CSS-based attack vectors, from clickjacking to input manipulation, and how to stop them.

TDPSA: Guide to Requirements + Website Compliance

Juan Combariza — Thu, 18 Dec 2025 00:00:00 GMT

Get a clear breakdown of Texas Data Privacy and Security Act rules, enforcement timelines, and how to manage third-party scripts correctly.

The British Airways Attack of 2018 - The Deeper Story

Simon Wijckmans — Mon, 15 Dec 2025 00:00:00 GMT

The 2018 British Airways attack affected 429,612 individuals. See why cside bought the attacker domain to turn it into a lesson on modern web security.

How cside brought AI to Client-Side Security

Simon Wijckmans — Sun, 14 Dec 2025 00:00:00 GMT

In 2024, cside launched the first client-side security solution with integrated AI for JavaScript security analysis and compliance automation.

Addressing Incorrect Claims Made by Reflectiz About cside

Simon Wijckmans — Mon, 08 Dec 2025 00:00:00 GMT

Learn why Reflectiz’s scanner-based claims about cside are incorrect and how cside’s real-time client-side security provides deeper protection, full payload forensics, and PCI DSS 4.0.1 compliance.

Magecart Protection: How Attacks Work and How to Stop Them

Juan Combariza — Tue, 02 Dec 2025 00:00:00 GMT

Magecart steals card numbers from checkout pages while WAFs see nothing. Learn how it works, detection signs, and protection controls for 2026.

Script Integrity Management for e-commerce Brands (SRI, Dynamic Scripts)

Simon Wijckmans — Wed, 26 Nov 2025 00:00:00 GMT

Deep dive into script integrity vs Subresource Integrity vs behavioral monitoring for PCI DSS 6.4.3, 11.6.1, ISO 27001, and HIPAA compliance.

CTDPA: Guide to Requirements + Third-Party Script Compliance

Juan Combariza — Tue, 25 Nov 2025 00:00:00 GMT

Get a clear breakdown of Connecticut Data Privacy Act rules, enforcement timelines, and how to manage third-party scripts correctly.

Expired Domain Risks: A Real Example from Oracle's Website

Juan Combariza — Tue, 25 Nov 2025 00:00:00 GMT

An expired domain reference is all an attacker needs to execute phishing under a trusted origin. This blog looks at an example from Oracle's code.

How WebView mobile apps are dangerous for banking

Simon Wijckmans — Fri, 21 Nov 2025 00:00:00 GMT

Banking "apps" that run on browser environments expose credentials without teams realizing it. This article explores examples of WebView mobile app attacks.

Shady Plugins in WooCommerce: Security Risks & Protection Tips

Juan Combariza — Wed, 19 Nov 2025 00:00:00 GMT

Your checkout is only as safe as your plugins. Discover how WooCommerce handles plugin HTML, why that matters, and the steps to stop malicious code.

Merchant Chargeback Prevention: The 2026 Playbook

Juan Combariza — Sat, 08 Nov 2025 00:00:00 GMT

Still have a chargeback stack built for the pre-VAMP era? Here's how leading fraud teams use early dispute blocking to stay ahead of tighter rules in 2026.

Device Fingerprinting in CE 3.0 | How to Block More Chargeback Disputes

Juan Combariza — Tue, 21 Oct 2025 00:00:00 GMT

This is how merchants use device fingerprinting to win more Compelling Evidence cases (VISA). It blocks first-party fraud and lowers VAMP ratios.

Why Chargeback Indemnification No Longer Works With the New VAMP Ratio

Mike Kutlu — Thu, 09 Oct 2025 00:00:00 GMT

Chargeback indemnification won't shield you under the 2026 VAMP rules. Penalties and terminations still hit. Here's how to adapt.

Client-Side Security: How to Monitor Every Browser Script

Simon Wijckmans — Thu, 02 Oct 2025 00:00:00 GMT

Client-side security monitors the scripts running in your users' browsers, detecting Magecart skimming and data exfiltration that your WAF and server never see.

Mockito docs hijacked

Simon Wijckmans — Tue, 30 Sep 2025 00:00:00 GMT

Some attacks are stupidly low tech. Mockito, a popular open source package contained a malicious link in their Github Docs.

Vibe Coding Security Risks: Client-Side Exposures in AI Platforms (Lovable, Copilot, Cursor & more)

Simon Wijckmans — Tue, 30 Sep 2025 00:00:00 GMT

Understand the common vulnerabilities in code made with AI coding platforms like Lovable, Copilot, Cursor, + Replit. See how to fix them before you ship them.

Chargebacks911 and cside Partner to Fight Chargeback Fraud

Juan Combariza — Tue, 09 Sep 2025 00:00:00 GMT

We're excited to reveal our partnership with Chargebacks911. Merging CB911's expertise with cside's client-side intelligence helps merchants fight friendly fraud and win more chargeback disputes.

cside Joins AWS Partner Network and ISV Accelerate

Juan Combariza — Tue, 09 Sep 2025 00:00:00 GMT

Working alongside AWS helps us bring our solution to the cloud environment our customers already rely on. For us, this is a step towards making client-side security widely accessible.

QSA Assessment Checklist for Client-Side PCI Requirements

Simon Wijckmans — Tue, 09 Sep 2025 00:00:00 GMT

We put together a shorthand checklist, red flags to look for, and the compliance differences between CSP, Crawlers, and Client-side scripts.

The Blockchain Is Not Your Friend: Examining EtherHiding and using Blockchain for Attacks

Jack LaFond — Tue, 02 Sep 2025 00:00:00 GMT

In March/April of 2025 a ClickFix variant was going around that used the Binance blockchain with smart contracts to control malware payloads that would surface from a hacked WordPress plugin.

Deobfuscating Third-Party JavaScript Code | A Security Engineer's Guide

Jack LaFond — Thu, 28 Aug 2025 00:00:00 GMT

From a security perspective, a third-party script with obfuscated code is a massive red flag. This guide explores methods to deobfuscate JavaScript and how to spot common attacks.

How to comply with PCI 6.4.3 and 11.6.1 | Practical guide for security teams

Mike Kutlu — Tue, 19 Aug 2025 00:00:00 GMT

A practical guide to PCI 6.4.3 for security teams in eCommerce, FinTech, and SaaS. Learn why CSP or Crawlers are not enough to protect your users.

Cosmic Ray Bit Flips and the Hidden Risk at Scale

Jack LaFond — Fri, 08 Aug 2025 00:00:00 GMT

When a 1 in a million rare occurrence, turns out not to be so rare. How our atmosphere changes zero to ones and how it can impact security.

Client-Side Attack Report Q2 2025

Simon Wijckmans — Wed, 30 Jul 2025 00:00:00 GMT

Q2 2025: cside tracked 72,740 compromised sites. Chinese PWA scams, Google OAuth abuse, a CoinMarketCap wallet drainer, ClickFix and SEO poisoning.

The PII Blind Spot in Web Security

Simon Wijckmans — Wed, 30 Jul 2025 00:00:00 GMT

But PII moves through the frontend, where controls are weaker and visibility is often limited.

UK Internet Age Verification System explained for cyber security

Simon Wijckmans — Tue, 29 Jul 2025 00:00:00 GMT

The goal of the UK Internet Age Verification System is to protect children browsing on the internet. But these checks come with new cybersecurity risks and privacy concerns.

cside at PCI SSC 2025 North America Community Meeting

Simon Wijckmans — Thu, 24 Jul 2025 00:00:00 GMT

We are in town for the PCI SSC 2025 North America Community Meeting, September 16th to 18th.

How Chrome extensions can remove security headers

Simon Wijckmans — Mon, 21 Jul 2025 00:00:00 GMT

Many browsers actively update extensions without specific approval or opt-in. This means that an extension today can behave wildly differently tomorrow, and you will not be made aware of it.

CryptoJacking is dead: long live CryptoJacking

Himanshu Anand — Thu, 17 Jul 2025 00:00:00 GMT

Modern crypto jacking has evolved into a silent, multi-stage attacks.

Magecart targeting east asian e-commerce websites on OpenCart

Himanshu Anand — Tue, 15 Jul 2025 00:00:00 GMT

We've detected a magecart-style attack targeting the OpenCart CMS platform

Affiliate hijacking and traffic hijacking: how fraud scripts reroute users

Himanshu Anand — Thu, 10 Jul 2025 00:00:00 GMT

Affiliate hijacking steals commissions two ways: SERP bidding fraud intercepts users pre-click, browser-side scripts rewrite attribution mid-session.

cside at BlackHat USA 2025

Simon Wijckmans — Wed, 09 Jul 2025 00:00:00 GMT

cside is exhibiting at BlackHat USA 2025.

Is relying on Indicators of Compromise secure enough?

Himanshu Anand — Thu, 03 Jul 2025 00:00:00 GMT

Most security programs today still rely heavily on Indicators of Compromise (IOCs). This approach fails to detect threats that evolve slowly, reuse infrastructure, or operate in narrow, high-value contexts like client-side web skimming.

Why crawlers can't help with PCI compliance (alone)

Simon Wijckmans — Thu, 03 Jul 2025 00:00:00 GMT

Crawlers act like a user but are very clearly not a real human user. If a malicious script would get injected because of a user interaction, the crawler will not see the malicious script unless it makes that user interaction

PCI Compliance 4.0.1: A Practical Implementation Guide Webinar

Simon Wijckmans — Thu, 26 Jun 2025 00:00:00 GMT

We partnered up with VikingCloud, the largest global PCI compliance QSA and security firm on 2 webinars giving you the full context and info to implement PCI DS 4.0.1. With a special focus on requirements 6.4.3 & 11.6.1.

Why We’re Called cside

Simon Wijckmans — Wed, 25 Jun 2025 00:00:00 GMT

We named ourselves after the part of the web that no one else was protecting: the client-side.

CoinMarketCap Client-Side Attack: A Comprehensive Analysis

Himanshu Anand — Mon, 23 Jun 2025 00:00:00 GMT

On June 20, 2025, CoinMarketCap (CMC), a major real-time crypto data platform, experienced a client-side security incident.

Weaponized Google OAuth Triggers Malicious WebSocket

Himanshu Anand — Tue, 10 Jun 2025 00:00:00 GMT

An attacker is using 'Google.com' to deliver and execute their own code in a weaponized Google OAuth attack.

Ruthless Client-Side Attacks Targeting Multiple Platforms with ClickFix

Himanshu Anand — Wed, 28 May 2025 00:00:00 GMT

In this article, we break down a recent ClickFix variant that now targets macOS, Android, and iOS, using browser-based redirections, fake UI prompts, and even drive-by download techniques.

Chinese Adult Scam Targets Mobile Users Through PWA

Himanshu Anand — Tue, 20 May 2025 00:00:00 GMT

We've identified a fresh injection campaign abusing third-party JavaScript to redirect users.

Malicious North Korean actors attempt to infiltrate technology companies

Simon Wijckmans — Thu, 01 May 2025 00:00:00 GMT

Catching fraudulent job applicants.

Client-Side Attack Recap - Q1 2025

Simon Wijckmans — Wed, 30 Apr 2025 00:00:00 GMT

cside's research uncovered nearly 300,000 compromised websites in Q1 of 2025.

VikingCloud approves cside for PCI DSS requirement 6.4.3 and 11.6.1

Simon Wijckmans — Thu, 24 Apr 2025 00:00:00 GMT

cside has partnered with VikingCloud to perform a deep technical assessment of the security solutions we offer under the enterprise plan, within the scope of PCI compliance. With proper implementation, our products meet requirements 6.4.3 and 11.6.1.

Free vs Paid PCI DSS Compliance: What Actually Works

Simon Wijckmans — Wed, 23 Apr 2025 00:00:00 GMT

The short answer: Without an off the shelf solution, you'd have to build a DIY monitoring tool that would cos significantly more in wages than a prebuilt solution's vendor costs.

What is PCI SSF? PCI SSF vs PCI DSS Explained (2026)

Simon Wijckmans — Tue, 22 Apr 2025 00:00:00 GMT

PCI SSF applies to payment software vendors. PCI DSS applies to merchants and anyone else handling cardholder data. Here is the practical breakdown for 2026.

Over 150K websites hit by full-page hijack linking to Chinese gambling sites

Himanshu Anand — Wed, 26 Mar 2025 00:00:00 GMT

We estimate that approximately 150,000 websites have been impacted by this campaign. The script defines an array of keywords related to betting, gambling, and casino brands both in English and Chinese.

Adyen PCI DSS Compliance: Merchant Steps and SAQ Levels

Simon Wijckmans — Fri, 21 Mar 2025 00:00:00 GMT

Adyen is PCI DSS Level 1 certified, but merchants still own requirements 6.4.3 and 11.6.1 on their own checkout page.

Braintree PCI DSS Compliance: What PayPal Merchants Still Need to Do

Simon Wijckmans — Fri, 21 Mar 2025 00:00:00 GMT

Braintree holds PCI Level 1 certification as a PayPal service. Merchants remain responsible for payment page script monitoring under §6.4.3 and §11.6.1 regardless of integration type.

Stripe PCI Compliance: What Stripe Covers, What You Own

Simon Wijckmans — Fri, 21 Mar 2025 00:00:00 GMT

Stripe covers its own infrastructure. Merchants own §6.4.3 script authorization and §11.6.1 header monitoring on the checkout page.

BSidesSF and RSAC Event

Simon Wijckmans — Thu, 13 Mar 2025 00:00:00 GMT

When cside is exhibiting, the afterparties are in town! Organized by us, Socket, Arcjet and Incident! Find our booth at BSidesSF (follow the laser), and booth 2438 at RSAC. Register for the 30th of April Book a meeting Join us for a cybersecurity networking event at the Rooftop of our investor Uncork Capital in San Francisco! Organized by cside, Socket, Arcjet, and Incident, these events bring together 250+ techies, cybersecurity professionals, and BS

How to be a PCI DSS SAQ A company (6.4.3 and 11.6.1)

Simon Wijckmans — Fri, 07 Mar 2025 00:00:00 GMT

One sentence sparks debate. Because sites load scripts dynamically, a script from any page can persist into checkout, potentially interfering with payments. Third-party scripts, even if unrelated or on pages loaded before the payment pages, can introduce vulnerabilities.

Thousands of websites hit by four backdoors in 3rd party JavaScript attack

Himanshu Anand — Tue, 04 Mar 2025 00:00:00 GMT

While analyzing threats targeting WordPress frameworks, we found an attack where a single 3rd party JavaScript file was used to inject four separate backdoors into 1,000 compromised websites using cdn.csyndication[.]com/.

Bybit Attack: $1.5B stolen through malicious JavaScript

Simon Wijckmans — Thu, 27 Feb 2025 00:00:00 GMT

The attackers injected malicious JavaScript into the website interface where Bybit's employees normally approve transactions. This malicious code was hidden in such a way that everything looked normal on the screen, but behind the scenes, it changed important details.

Over 35,000 Websites Targeted in Full-Page Hijack Linking to a Chinese-Language Gambling Scam

Himanshu Anand — Thu, 20 Feb 2025 00:00:00 GMT

A new malware campaign has compromised 35,000+ websites, injecting a malicious script from the websites listed below. Once the script loads, it fully hijacks the user's browser window, often redirecting them to pages promoting a Chinese-language gambling (or casino) platform.

cside is now SOC2 compliant

Simon Wijckmans — Wed, 05 Feb 2025 00:00:00 GMT

We're proud to announce our SOC2 type 2 audit has passed and we passed with the highest degree of approval.

Demystifying the January 2025 updates to PCI DSS SAQ A

Simon Wijckmans — Sun, 02 Feb 2025 00:00:00 GMT

A full detailed explanation, chart and guide to the changes regarding PCI DSS 4.0.1 - 6.4.3 and 11.6.1

10,000 WordPress Websites Found Delivering MacOS and Windows Malware

Himanshu Anand — Mon, 27 Jan 2025 00:00:00 GMT

We identified over 10,000 WordPress loading showing fake Google browser update leading to malware downloads.

Government and university websites targeted in ScriptAPI[.]dev client-side attack

Himanshu Anand — Tue, 21 Jan 2025 00:00:00 GMT

Yesterday we discovered another client-side JavaScript attack targeting +500 websites, including governments and universities. The injected scripts create hidden links, pointing to external websites, inside the Document Object Model (DOM), the programming interface for web documents.

Affiliate tracking and its cyber security risks

Simon Wijckmans — Mon, 20 Jan 2025 00:00:00 GMT

Malicious actors often exploit tracking pixels to inject harmful scripts on otherwise normal websites.

The cost of false positives - how we became a target

Himanshu Anand — Fri, 17 Jan 2025 00:00:00 GMT

This week, we identified an intriguing use case involving the WP3[.]XYZ attack. It sparked interest across the community and led to better detection rates on platforms like VirusTotal. While most appreciated our efforts, others criticized us for not identifying the root cause or recommending services to clean up hacked websites. We still want to keep the community aware of attacks like this and do better each time.

Over 5,000 WordPress sites caught in WP3[.]XYZ malware attack

Himanshu Anand — Mon, 13 Jan 2025 00:00:00 GMT

We've uncovered a widespread malware campaign targeting WordPress websites, affecting over 5,000 sites globally. The malicious domain: "https://wp3.xyz/plugin[.]php".

Why Content Security Policy doesn't work

Simon Wijckmans — Tue, 07 Jan 2025 00:00:00 GMT

Content Security Policy (CSP) is a security feature provided by web browsers that a website owner can use to define a set of rules that control which resources (e.g., scripts, styles, images) can be loaded and executed by the browser. We call this the client-side, which is at the very end of the web supply chain. When properly configured, it helps prevent a wide range of attacks. But those first three words make all the difference. It can help prevent: Cross-Site Scripting (XSS): By restricti

Ad marketplaces security and compliance risks

Simon Wijckmans — Mon, 23 Dec 2024 00:00:00 GMT

For businesses monetizing through ad marketplace models, the less traditional 3rd-party advertising networks, analytics platforms, and marketing scripts are indispensable. They're needed to drive revenue by boosting engagement and tracking user behavior.

A new Progressive Web App danger very few know about

Simon Wijckmans — Fri, 20 Dec 2024 00:00:00 GMT

With the rise in adoption of PWAs comes an increase in client-side security risks. And the industry? It's barely talking about it.

The Polyfill[.]io attack - More than just a redirect attack

Simon Wijckmans — Fri, 06 Dec 2024 00:00:00 GMT

A redirect was only what was caught. With control of one third-party script on half a million sites, far worse was possible. Here is why it mattered.

New 3rd party JS script attack found: Artifyau[.]com and Quantifymy[.]com

Himanshu Anand — Mon, 04 Nov 2024 00:00:00 GMT

This week, we deployed a specialized crawler for research purposes. Within just 24 hours, it identified new Magecart attack patterns. Magecart is a sophisticated, financially motivated threat that injects malicious JavaScript to steal personal payment information. Here's a list of the biggest Magecart attacks thus far. Initial Detection: Obfuscated JavaScript on Artifyau[.]com Detected URL: https://artifyau[.]com/T1M0dVluVnBiR1J6YVhSbGNISnZMbU52YlE9PQ/jqwery.js. The URL mimics a

New Magecart attack code revealed

Himanshu Anand — Wed, 23 Oct 2024 00:00:00 GMT

On October 14th, we posted an article on how another Magento Magecart attack was taking place. Then we only noticed one script as the culprit. Today, we were able to find and analyze the attack in more detail. The attack decoded This was the injected code: