CVE-2021-40691: Moodle

Medium severity, CVSS 4.3. EPSS: 0.7% chance of exploitation in the next 30 days.

A session hijack risk was identified in the Shibboleth authentication plugin.

Affected products

• Moodle Moodle: before 3.9.10 (fixed in 3.9.10); from 3.10.0, before 3.10.7 (fixed in 3.10.7); from 3.11.0, before 3.11.3 (fixed in 3.11.3)

Published 2022-09-29. Last modified 2026-06-17.