CVE-2011-3666: Mozilla Firefox

Medium severity, CVSS 6.8. EPSS: 1% chance of exploitation in the next 30 days.

Mozilla Firefox before 3.6.25 and Thunderbird before 3.1.17 on Mac OS X do not consider .jar files to be executable files, which allows user-assisted remote attackers to bypass intended access restrictions via a crafted file. NOTE: this vulnerability exists because of an incorrect fix for CVE-2011-2372 on Mac OS X.

Affected products

• Mozilla Firefox: up to and including 3.6.24; version 0.1 only; version 0.2 only; version 0.3 only; version 0.4 only; version 0.5 only; …
• Mozilla Thunderbird: up to and including 3.1.16; version 0.1 only; version 0.2 only; version 0.3 only; version 0.4 only; version 0.5 only; …

Published 2011-12-21. Last modified 2026-06-16.