CVE-2016-5265: Mozilla Firefox

Medium severity, CVSS 5.5. EPSS: 1.2% chance of exploitation in the next 30 days.

Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 allow user-assisted remote attackers to bypass the Same Origin Policy, and conduct Universal XSS (UXSS) attacks or read arbitrary files, by arranging for the presence of a crafted HTML document and a crafted shortcut file in the same local directory.

Affected products

• Mozilla Firefox: up to and including 47.0.1; version 45.1.0 only; version 45.1.1 only; version 45.2.0 only; version 45.3.0 only
• Oracle Linux: version 5.0 only; version 6 only; version 7 only

Published 2016-08-05. Last modified 2026-06-17.