CVE-2008-5504: Mozilla Firefox

High severity, CVSS 7.5. EPSS: 2.6% chance of exploitation in the next 30 days.

Mozilla Firefox 2.x before 2.0.0.19 allows remote attackers to run arbitrary JavaScript with chrome privileges via vectors related to the feed preview, a different vulnerability than CVE-2008-3836.

Affected products

• Mozilla Firefox: up to and including 2.0.0.18; version 2.0 only; version 2.0.0.1 only; version 2.0.0.2 only; version 2.0.0.3 only; version 2.0.0.4 only; …

Published 2008-12-17. Last modified 2026-06-16.