CVE-2007-5339: Mozilla Firefox

Medium severity, CVSS 4.3. EPSS: 3.4% chance of exploitation in the next 30 days.

Multiple vulnerabilities in Mozilla Firefox before 2.0.0.8, Thunderbird before 2.0.0.8, and SeaMonkey before 1.1.5 allow remote attackers to cause a denial of service (crash) via crafted HTML that triggers memory corruption or assert errors.

Affected products

• Mozilla Firefox: up to and including 2.0.0.7
• Mozilla Seamonkey: up to and including 1.1.4
• Mozilla Thunderbird: up to and including 2.0.0.6

Published 2007-10-21. Last modified 2026-06-16.