Collected research

Cross Site URL Hijacking by using Error Object in Mozilla Firefox

Soroush Dalili · soroush.me

Firefox's script error handling reports the exact source URL that caused an error, and that reporting crosses origins. Deliberately triggering a fetch error against another site therefore discloses the destination URL reached after redirection, revealing whether the victim is logged in and exposing any confidential query parameters such as a session ID.

Record

Researcher

Soroush Dalili

Published by

soroush.me

Topic

Browser

In the archive

• Collected in the 2010 research round

Related sources

• Cross-Site URL Hijacking in Firefox Whitepaper
• Cross-Site URL Hijacking in Firefox

Tags

• info-leak
• side-channel
• xsleak
• sop-bypass
• same-origin-policy
• javascript
• detection
• owasp-a01-2021
• owasp-a09-2021

This page is the archive's own catalogue record. The research is the work of Soroush Dalili, first published at the original source. Preserved copies are kept so the citation survives its host; this one was last captured on 11 August 2026.