CVE-2007-5947: Mozilla Firefox

Medium severity, CVSS 4.3. EPSS: 2.7% chance of exploitation in the next 30 days.

The jar protocol handler in Mozilla Firefox before 2.0.0.10 and SeaMonkey before 1.1.7 retrieves the inner URL regardless of its MIME type, and considers HTML documents within a jar archive to have the same origin as the inner URL, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a jar: URI.

Affected products

• Mozilla Firefox: up to and including 2.0.0.9; 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; …
• Mozilla Seamonkey: up to and including 1.1.6; version 1.1.1 only; version 1.1.2 only; version 1.1.3 only; version 1.1.4 only; version 1.1.5 only

Published 2007-11-14. Last modified 2026-06-16.