CVE-2013-4522: Moodle

Medium severity, CVSS 5.0. EPSS: 1.5% chance of exploitation in the next 30 days.

lib/filelib.php in Moodle through 2.2.11, 2.3.x before 2.3.10, 2.4.x before 2.4.7, and 2.5.x before 2.5.3 does not send "Cache-Control: private" HTTP headers, which allows remote attackers to obtain sensitive information by requesting a file that had been previously retrieved by a caching proxy server.

Affected products

• Moodle Moodle: up to and including 2.2.11; version 1.1.1 only; version 1.2.0 only; version 1.2.1 only; version 1.3.0 only; version 1.3.1 only; …

Published 2013-11-26. Last modified 2026-06-16.