CVE-2008-2809: Mozilla Firefox

Medium severity, CVSS 4.0. EPSS: 1.2% chance of exploitation in the next 30 days.

Mozilla 1.9 M8 and earlier, Mozilla Firefox 2 before 2.0.0.15, SeaMonkey 1.1.5 and other versions before 1.1.10, Netscape 9.0, and other Mozilla-based web browsers, when a user accepts an SSL server certificate on the basis of the CN domain name in the DN field, regard the certificate as also accepted for all domain names in subjectAltName:dNSName fields, which makes it easier for remote attackers to trick a user into accepting an invalid certificate for a spoofed web site.

Affected products

• Mozilla Firefox: version 2.0.0.1 only; version 2.0.0.2 only; version 2.0.0.3 only; version 2.0.0.4 only; version 2.0.0.5 only; version 2.0.0.6 only; …
• Mozilla Geckb: up to and including 1.9
• Mozilla Seamonkey: up to and including 1.0.9; version 1.1.5 only
• Netscape Navigator: version 9.0 only

Published 2008-07-08. Last modified 2026-06-16.