CVE-2013-0801: Mozilla Firefox

High severity, CVSS 10.0. EPSS: 5.4% chance of exploitation in the next 30 days.

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 21.0, Firefox ESR 17.x before 17.0.6, Thunderbird before 17.0.6, and Thunderbird ESR 17.x before 17.0.6 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

Affected products

• Mozilla Firefox: up to and including 20.0.1; version 19.0 only; version 19.0.1 only; version 19.0.2 only; version 20.0 only; version 17.0 only; …
• Mozilla Thunderbird: up to and including 17.0.5; version 17.0 only; version 17.0.1 only; version 17.0.2 only; version 17.0.3 only; version 17.0.4 only
• Mozilla Thunderbird ESR: version 17.0 only; version 17.0.1 only; version 17.0.2 only; version 17.0.3 only; version 17.0.4 only; version 17.0.5 only

Published 2013-05-16. Last modified 2026-06-16.