Collected research

Non-Alpha-Non-Digit 3

ha.ckers.org web application security lab

Yair Amit's IE parser quirk: a tag and its attribute can be separated by a slash, so <SCRIPT/SRC="..."> needs no whitespace at all. Unlike the earlier non-alpha-non-digit vectors it requires no space, defeating XSS filters that use whitespace to find where a tag ends. IE6-7 and Netscape 8 in IE mode.

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
• parser-differential
• sanitizer-bypass
• 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 16 August 2026.