CVE-2012-3965: Mozilla Firefox

High severity, CVSS 9.3. EPSS: 2.4% chance of exploitation in the next 30 days.

Mozilla Firefox before 15.0 does not properly restrict navigation to the about:newtab page, which allows remote attackers to execute arbitrary JavaScript code with chrome privileges via a crafted web site that triggers creation of a new tab and then a new window.

Affected products

• Mozilla Firefox: up to and including 14.0; 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 2012-08-29. Last modified 2026-06-16.