CVE-2026-86416: Ilias-Elearning E.v Ilias

Medium severity, CVSS 5.4. EPSS: 0.4% chance of exploitation in the next 30 days.

ILIAS versions before 9.23, 10.11, and 11.4 contain an authorization bypass vulnerability in ilObjGroupGUI where saveMapSettingsObject() and updateGroupTypeObject() perform state-changing operations without write permission checks. Authenticated users with only read access to a group can craft POST requests to modify group map settings and didactic template assignments, changing group modes and permissions for all members.

Affected products

• Ilias-Elearning E.v Ilias: from 9.0, before 9.23 (fixed in 9.23); from 10.0, before 10.11 (fixed in 10.11); from 11.0, before 11.4 (fixed in 11.4)

Published 2026-09-07. Last modified 2026-09-18.