CVE-2015-4483: Mozilla Firefox

Medium severity, CVSS 4.3. EPSS: 1.5% chance of exploitation in the next 30 days.

Mozilla Firefox before 40.0 allows man-in-the-middle attackers to bypass a mixed-content protection mechanism via a feed: URL in a POST request.

Affected products

• Mozilla Firefox: up to and including 39.0.3
• Opensuse Opensuse: version 13.1 only; version 13.2 only
• Oracle Solaris: version 11.3 only

Published 2015-08-16. Last modified 2026-06-17.