Bypassing XSS Filters

TL;DR

XSS filters try to stop malicious code from running in a web browser. They often block common tags like alert('XSS')

Polyglot Payloads: Create payloads that work in multiple contexts (e.g., HTML, JavaScript).

Filter Evasion Characters: Some filters block specific characters. Try using alternative representations or encoding.

Context Matters: The effectiveness of these techniques depends on the specific filter being used and where the input is placed in the web page.
Browser Variations: Different browsers may interpret JavaScript differently, so test your payloads across multiple browsers.
cyber security Best Practices: Always sanitize user input on the server-side to prevent XSS vulnerabilities. Client-side filtering should be considered a secondary layer of defense.