CVE-2005-1155: Mozilla Firefox

High severity, CVSS 7.5. EPSS: 8.3% chance of exploitation in the next 30 days.

The favicon functionality in Firefox before 1.0.3 and Mozilla Suite before 1.7.7 allows remote attackers to execute arbitrary code via a <LINK rel="icon"> tag with a javascript: URL in the href attribute, aka "Firelinking."

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: version 1.3 only; version 1.4 only; version 1.4.1 only; version 1.5 only; version 1.5.1 only; version 1.6 only; …

Published 2005-05-02. Last modified 2026-06-16.