Your User's Browser Is the Attack Surface
Traditional security tools protect your servers and APIs, but they can't see what's happening in the browser. Malicious scripts can steal user credentials, session tokens, and sensitive data before it ever reaches your backend.
Analytics platforms, customer support widgets, marketing tools, and payment processors all execute JavaScript in your users' browsers. A breach in any one of these can compromise your entire application.
SOC 2, ISO/IEC 27001, and GDPR all require you to protect user data from unauthorized access. This includes data in the browser, but most SaaS companies don't have visibility into client-side threats.
Attackers are targeting the software supply chain, compromising trusted libraries and SDKs. When you update a dependency, you could be introducing malicious code into your application.
Our hybrid proxy architecture provides comprehensive client-side protection that integrates seamlessly with your SaaS application, giving you visibility and control over every script running in your users' browsers.
Our hybrid proxy monitors the activity of every script, blocking malicious code from reaching users on your platform or workflows.
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.
Generate device fingerprints to prove legitimate subscription sign-ups and prevent friendly fraud chargebacks from customers claiming unauthorized transactions.
Access to user credentials, API keys, and business data across multiple customers
Integrations with multiple third-party services increase attack entry points
Onboarding forms collect sensitive business information
Modern web apps serve more code in the browser, widening the attack surface.
"cside security gives us the visibility we need into our client-side attack surface. We can now proactively identify and mitigate threats before they impact our users."
Let our experts show you how to protect your SaaS platform from client-side attacks and data breaches.
Common Client-Side Attacks on SaaS Platforms
Malicious scripts steal session tokens and authentication cookies, allowing attackers to impersonate legitimate users
Compromised scripts capture sensitive business data, user information, and proprietary data displayed in the browser
Attackers compromise trusted npm packages, analytics libraries, or SDK providers to inject malicious code into your application
Scripts from expired or abandoned domains can be purchased by attackers and modified to steal data
Attackers inject malicious scripts through user inputs or API vulnerabilities to steal credentials or perform unauthorized actions
Malicious code intercepts form submissions to steal login credentials, payment information, or other sensitive data
Scripts that record every keystroke in the browser, capturing passwords, credit card numbers, and confidential information
Hidden scripts that use your users' computing resources to mine cryptocurrency, degrading performance and user experience
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 |
cside provides comprehensive audit logs, real-time monitoring, and automated alerts for all client-side activity. This gives auditors the visibility they need to verify that user data is protected from unauthorized access in the browser. Learn more about ISO/IEC 27001 compliance.
Yes. cside integrates with your SIEM, security orchestration platforms, and incident response workflows via webhooks and APIs. We complement your existing security stack by covering the client-side attack surface.
Most SaaS platforms can deploy cside in under a week. Our hybrid proxy architecture requires minimal code changes and integrates seamlessly with your existing infrastructure.