Auth bypass in Ilias-Elearning E.v. Ilias
CVE-2026-86416
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.
Vulnerability class: Broken Access Control
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (technical-description)
- disclosure@vulncheck.com (technical-description)
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-86416?
- CVE-2026-86416 is a medium-severity vulnerability in Ilias-Elearning E.v. Ilias, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-09-07.
- How severe is CVE-2026-86416?
- Medium severity. CVSS v3 base score is 5.4 out of 10.