CVE-2005-1531: Mozilla Firefox

High severity, CVSS 7.5. EPSS: 3.3% chance of exploitation in the next 30 days.

Firefox before 1.0.4 and Mozilla Suite before 1.7.8 does not properly implement certain security checks for script injection, which allows remote attackers to execute script via "Wrapped" javascript: URLs, as demonstrated using (1) a javascript: URL in a view-source: URL, (2) a javascript: URL in a jar: URL, or (3) "a nested variant."

Affected products

• Mozilla Firefox: version 0.8 only; version 0.9 only; version 0.9.1 only; version 0.9.2 only; version 0.9.3 only; version 0.10 only; …
• Mozilla Mozilla: up to and including 1.4; version 1.4.1 only; version 1.5 only; version 1.5.1 only; version 1.6 only; version 1.7 only; …

Published 2005-05-12. Last modified 2026-06-16.