fix(backend): replace regex XSS detection with xss library#756
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Haroldwonder merged 1 commit intoJun 1, 2026
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…der#642) Regex-based XSS detection in containsXss() and sanitizeInput() can be bypassed with HTML entity encoding, Unicode escapes, or obfuscation. Replace custom regex patterns with the battle-tested xss npm package (v1.0.15) which handles all known bypass vectors.
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Summary
Closes #642
Replaces the custom regex-based
containsXssandsanitizeInputfunctions inbackend/src/sanitizer.tswith the battle-testedxssnpm package (v1.0.15).Problem
Regex patterns like
/<script/and/javascript:/are bypassable via:<script)\u003cscript)Fix
xss(input)for sanitizationcontainsXssnow returnstruewhenxss(input) !== inputxss@1.0.15Testing
The
xsslibrary has its own comprehensive test suite covering all known bypass vectors.