Top 10 winner

Our Favorite XSS Filters and how to Attack them

sirdarckcat · sirdarckcat.blogspot.com · 4 August 2009

A recap of the Black Hat USA 2009 talk on breaking XSS filters, pointing at the slides and a co-presenter's write-up. It records a fixed Google imgres same-origin exception, a PHP 4/5/6 utf8_decode flaw enabling filter bypasses, a NoScript denial of service, a PHPIDS bypass, and the author's client-side Active Content Signatures proposal.

Record

Researcher

sirdarckcat

Published by

sirdarckcat.blogspot.com

Date

4 August 2009

Topic

XSS

In the archive

• Ranked #8 in the 2009 Top 10 Web Hacking Techniques

Tags

• xss
• filter-bypass
• waf-bypass
• browser-extension
• sanitizer-bypass
• javascript
• php
• unicode
• owasp-a03-2021
• owasp-a05-2021

This page is the archive's own catalogue record. The research is the work of sirdarckcat, first published at the original source. Preserved copies are kept so the citation survives its host; this one was last captured on 10 September 2026.