CVE-2008-5013: Mozilla Firefox

High severity, CVSS 9.3. EPSS: 4.8% chance of exploitation in the next 30 days.

Mozilla Firefox 2.x before 2.0.0.18 and SeaMonkey 1.x before 1.1.13 do not properly check when the Flash module has been dynamically unloaded properly, which allows remote attackers to execute arbitrary code via a crafted SWF file that "dynamically unloads itself from an outside JavaScript function," which triggers an access of an expired memory address.

Affected products

• Mozilla Firefox: up to and including 2.0.0.17; version 0.8 only; version 0.9 only; version 0.9.1 only; version 0.9.2 only; version 0.9.3 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; …

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