Authorization bypass through user-controlled key in Admidio - #VU138938
Published: July 21, 2026
Vulnerability identifier: #VU138938
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Admidio
Affected software:
Admidio
Admidio
Detailed vulnerability description
The vulnerability allows a remote user to modify other users' list configurations.
The vulnerability exists due to authorization bypass through a user-controlled key in the save_temporary mode of modules/groups-roles/mylist_function.php when processing a user-supplied list_uuid. A remote user can submit a crafted request referencing another user's or a global list UUID to modify other users' list configurations.
Successful exploitation can transfer ownership of the referenced list to the current user and convert a global list into a personal one, causing it to disappear from other users' selectors.
Remediation
Install security update from vendor's website.