CVE-2015-7211: Fedoraproject Fedora

Medium severity, CVSS 5.0. EPSS: 2.5% chance of exploitation in the next 30 days.

Mozilla Firefox before 43.0 mishandles the # (number sign) character in a data: URI, which allows remote attackers to spoof web sites via unspecified vectors.

Affected products

• Fedoraproject Fedora: version 22 only; version 23 only
• Mozilla Firefox: up to and including 42.0
• Opensuse Leap: version 42.1 only
• Opensuse Opensuse: version 13.1 only; version 13.2 only

Published 2015-12-16. Last modified 2026-06-17.