CVE-2026-86416

Description

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.

CVSS breakdown

Affected products

• ILIAS-eLearning e.V. / ILIAS9.0 – 9.23
• ILIAS-eLearning e.V. / ILIAS10.0 – 10.11
• ILIAS-eLearning e.V. / ILIAS11.0 – 11.4

References

• MISChttps://docu.ilias.de/ilias.php?baseClass=ilrepositorygui&cmdNode=wy:ll:6t&cmdClass=ilBlogPostingGUI&cmd=previewFullscreen&ref_id=15821&blpg=942
• MISChttps://docu.ilias.de/ilias.php?baseClass=ilrepositorygui&cmdNode=wy:ll:6t&cmdClass=ilBlogPostingGUI&cmd=previewFullscreen&ref_id=15821&blpg=941
• MISChttps://docu.ilias.de/ilias.php?baseClass=ilrepositorygui&cmdNode=wy:ll:6t&cmdClass=ilBlogPostingGUI&cmd=previewFullscreen&ref_id=15821&blpg=940
• PATCHhttps://github.com/ILIAS-eLearning/ILIAS/commit/16bca712847f83440fa051cdbb15b38296357c79
• MISChttps://github.com/ILIAS-eLearning/ILIAS/blob/v11.3/components/ILIAS/Group/classes/class.ilObjGroupGUI.php#L560-L569
• MISChttps://github.com/ILIAS-eLearning/ILIAS/blob/v11.3/components/ILIAS/Group/classes/class.ilObjGroupGUI.php#L830-L858
• MISChttps://github.com/ILIAS-eLearning/ILIAS
• VENDOR_ADVISORYhttps://www.vulncheck.com/advisories/ilias-before-9.23-10.11-and-11.4-missing-authorization-in-group-object-action-methods