Web Hack List

Collected research

NULLs in entities in Firefox

Firefox accepted NULL bytes inside HTML5 named entities, so an entity can be written with a NULL before the ampersand or before the semicolon and still resolve. That yields malformed-looking spellings of an entity-encoded colon in a javascript URL, which work in an anchor href, apparently requiring the HTML5 doctype, and which filters matching the ordinary entity will miss.

Record

Researcher
Gareth Heyes
Published by
thespanner.co.uk
Topic
Browser

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