Other nomination

IE6.0 Protocol Guessing

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.

In the archive

• Nominated for the 2007 Top 10 Web Hacking Techniques

Tags

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

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