CVE-2016-2156: Moodle

Medium severity, CVSS 4.3. EPSS: 1.7% chance of exploitation in the next 30 days.

calendar/externallib.php in Moodle through 2.6.11, 2.7.x before 2.7.13, 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3 provides calendar-event data without considering whether an activity is hidden, which allows remote authenticated users to obtain sensitive information via a web-service request.

Affected products

• Moodle Moodle: up to and including 2.6.11; version 2.7.0 only; version 2.7.1 only; version 2.7.2 only; version 2.7.3 only; version 2.7.4 only; …

Published 2016-05-22. Last modified 2026-06-17.