Collected research

IE6.0 Protocol Guessing

ha.ckers.org web application security lab

SirDarckCat's report that IE6 guesses protocols: a four-character prefix before 'script:' resolves to javascript:, three or fewer to vbscript:, so MYscript:msgbox() and somescript:alert() execute. Anti-XSS filters matching the literal scheme names miss every variant. IE7 is not affected.

Record

Document

ha.ckers.org web application security lab

Published by

ha.ckers.org

Topic

Other

In the archive

• Collected in the 2007 research round

Tags

• xss
• filter-bypass
• sanitizer-bypass
• url-parsing
• parser-differential
• javascript
• owasp-a03-2021
• owasp-a05-2021

This page is the archive's own catalogue record. The research is the work of ha.ckers.org, first published at the original source. Preserved copies are kept so the citation survives its host; this one was last captured on 9 August 2026.