CVE-2012-1966: Mozilla Firefox

Medium severity, CVSS 4.3. EPSS: 2.2% chance of exploitation in the next 30 days.

Mozilla Firefox 4.x through 13.0 and Firefox ESR 10.x before 10.0.6 do not have the same context-menu restrictions for data: URLs as for javascript: URLs, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted URL.

Affected products

• Mozilla Firefox: version 4.0 only; version 4.0.1 only; version 5.0 only; version 5.0.1 only; version 6.0 only; version 6.0.1 only; …

Published 2012-07-18. Last modified 2026-06-16.