CVE-2009-3075: Mozilla Firefox

High severity, CVSS 10.0. EPSS: 5.3% chance of exploitation in the next 30 days.

Multiple unspecified vulnerabilities in the JavaScript engine in Mozilla Firefox before 3.0.14 and 3.5.x before 3.5.2, Thunderbird before 2.0.0.24, and SeaMonkey before 1.1.19 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to use of mutable strings in the js_StringReplaceHelper function in js/src/jsstr.cpp, and unknown vectors.

Affected products

• Mozilla Firefox: up to and including 3.0.13; version 0.1 only; version 0.2 only; version 0.3 only; version 0.4 only; version 0.5 only; …

Published 2009-09-10. Last modified 2026-06-16.