XSS - DOM Based Scanner
Detects DOM-based XSS vulnerabilities in client-side JavaScript code.
What is XSS - DOM Based?
DOM-based XSS occurs entirely in the browser when client-side JavaScript processes user input unsafely and writes it to the DOM. The malicious payload never goes to the server—the vulnerability exists in the client-side code that handles URL fragments, cookies, or other client-side data sources.
Why is This Important?
DOM-based XSS is often missed by server-side security tools because the attack payload may never reach the server (e.g., URL fragments after #). Modern single-page applications (SPAs) are particularly vulnerable due to extensive client-side DOM manipulation.
How It Works
1. Web Crawling
Intelligent crawling discovers all endpoints, forms, parameters, and dynamic content across your web application.
2. Payload Injection
AI-powered payloads test each input vector for web vulnerabilities with context-aware attack patterns.
3. Response Analysis
Advanced analysis detects vulnerability signatures in responses, confirming exploitability with proof-of-concept.
Key Capabilities
Industry-leading web security testing powered by AI, trusted by security teams worldwide for accurate vulnerability detection.
- Deep web crawling with JavaScript rendering support
- Context-aware payload generation for each parameter
- False positive elimination through response analysis
- OWASP Top 10 and CWE compliance mapping
- Seamless CI/CD and DevSecOps integration
Frequently Asked Questions
Why don't server-side scanners detect DOM XSS?
The payload often stays client-side only. URL fragments (#) aren't sent to the server, so server logs and WAFs never see the attack. Only client-side analysis can detect these vulnerabilities.
What are common DOM XSS sinks?
Dangerous functions include innerHTML, document.write, eval(), setTimeout with strings, location.href assignment, and jQuery methods like .html() and .append().
What are DOM XSS sources?
Sources of untrusted data include location.hash, location.search, document.referrer, document.cookie, localStorage, and postMessage data.
How do I prevent DOM XSS?
Use safe DOM manipulation methods like textContent instead of innerHTML, avoid eval() and document.write(), and sanitize all client-side data before DOM insertion.
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