CVE-2008-5016: Mozilla Firefox

Medium severity, CVSS 5.0. EPSS: 2.3% chance of exploitation in the next 30 days.

The layout engine in Mozilla Firefox 3.x before 3.0.4, Thunderbird 2.x before 2.0.0.18, and SeaMonkey 1.x before 1.1.13 allows remote attackers to cause a denial of service (crash) via multiple vectors that trigger an assertion failure or other consequences.

Affected products

• Mozilla Firefox: up to and including 3.0.3; version 3.0 only; version 3.0.1 only; version 3.0.2 only
• Mozilla Seamonkey: up to and including 1.1.12; version 1.0 only; version 1.0.1 only; version 1.0.2 only; version 1.0.3 only; version 1.0.4 only; …
• Mozilla Thunderbird: up to and including 2.0.0.17; version 2.0.0.0 only; version 2.0.0.4 only; version 2.0.0.5 only; version 2.0.0.6 only; version 2.0.0.9 only; …

Published 2008-11-13. Last modified 2026-06-16.