CVE-2013-1696: Mozilla Firefox

Medium severity, CVSS 4.0. EPSS: 1.7% chance of exploitation in the next 30 days.

Mozilla Firefox before 22.0 does not properly enforce the X-Frame-Options protection mechanism, which allows remote attackers to conduct clickjacking attacks via a crafted web site that uses the HTTP server push feature with multipart responses.

Affected products

• Mozilla Firefox: up to and including 21.0; version 19.0 only; version 19.0.1 only; version 19.0.2 only; version 20.0 only; version 20.0.1 only

Published 2013-06-26. Last modified 2026-06-16.