What cside delivers 
How cside Protects Payment Providers
Your customers are high value targets for attackers. We help you protect them from e-skimming on the checkout flows.
Client-side attacks target your merchant partners directly. These threats bypass traditional app security and put your payment ecosystem at risk. Protect your network with PCI Shield.
Your Infrastructure is Secure, the Browser is a Risk
Merchant websites load dozens of third-party scripts. One compromised script enables malicious code to steal customer data.
Traditional security tools protect servers and ignore the browser. CSPs, Crawlers, and JS agents are easy to evade with modern attacks.
Global standards like PCI DSS and GDPR hold companies liable for risks introduced by 3rd party scripts.
Your customers are high value targets for attackers. We help you protect them from e-skimming on the checkout flows.
Our hybrid proxy monitors the activity of every script on merchant payment pages, preventing attacks from spreading across your merchant network.
PCI 6.4.3 & 11.6.1 requirements with script inventory, change detection, justifications, and audit-ready reports.
Identify what personal data each third-party script has access to and where it's sent. Stay compliant with GDPR and prevent PII leaks.
Reduce friendly fraud (chargebacks) with device fingerprinting as dispute evidence. Improve VAMP ratios for merchants & acquirers.
Payment pages handle credit card data
High-value customer data (addresses, phone numbers, and purchase history)
One successful script exploit can be repeated across different merchants
Modern web apps load more code in the browser, widening the attack surface.
"cside tells me everything I need to know about a script, and makes sure they are safe to show to the user. It's really made me realize how big of a problem 3rd party script security is, and there are no other solutions I've tried that dive as deep as cside."
Our experts can conduct a client-side vulnerability assessment and provide a customized recommendation.
Common Client-Side Attacks on Merchants
Code hidden in checkouts or forms silently capture card numbers, CVVs, and addresses
Attackers purchase expired domains of scripts on your site to change code from an approved source
A breach in one of your trusted providers (analytics or integrations) can infect your entire site.
Advanced threats target sessions with specific criteria (e.g. IP address) to evade traditional detection.
Unmonitored scripts exfiltrate sensitive personal information such as addresses and IDs.
Injected ads or pop-ups inside the browser trick traders into clicking fraudulent links
Our hybrid proxy delivers advantages traditional tools can't match.
| vs. Crawler-Based Solutions | vs. Content-Security Policy (CSP) | vs. Client-Side Agents |
|---|---|---|
| Sees real user behavior, not sanitized crawler views | Monitors script payloads, not just sources | Undetectable monitoring attackers can't bypass |
| Catches attacks aimed at specific segments | Detects breaches at trusted third-party providers | Complete historical script behavior tracking |
| Detects threats between periodic scans | Handles dynamic scripts CSPs can't control | Future-proof against evolving techniques |