CVE-2011-4593: Moodle

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

Moodle 1.9.x before 1.9.15, 2.0.x before 2.0.6, and 2.1.x before 2.1.3 does not properly handle user/action_redir group messages, which allows remote authenticated users to discover e-mail addresses by visiting the messaging interface.

Affected products

• Moodle Moodle: version 1.9.1 only; version 1.9.2 only; version 1.9.3 only; version 1.9.4 only; version 1.9.5 only; version 1.9.6 only; …

Published 2012-07-20. Last modified 2026-06-16.