Collected research

A Twitter DomXss, a wrong fix and something more

Stefano Di Paola · blog.mindedsecurity.com

Twitter's new site assigned the URL fragment after '#!' straight to window.location, giving DOM XSS via twitter.com/#!javascript:alert(document.domain). Two successive patches failed: String.replace with a string argument strips only the first match, so '::' survived, and IE8 re-decoded the HTML entity form of the colon.

Record

Researcher

Stefano Di Paola

Published by

blog.mindedsecurity.com

Topic

Browser

In the archive

• Collected in the 2010 research round

Tags

• dom
• xss
• javascript
• filter-bypass
• sanitizer-bypass
• encoding
• case-study
• open-redirect
• owasp-a03-2021
• owasp-a04-2021
• owasp-a05-2021

This page is the archive's own catalogue record. The research is the work of Stefano Di Paola, first published at the original source. Preserved copies are kept so the citation survives its host; this one was last captured on 17 August 2026.