CVE-2026-41662
Admidio: Missing Minimum Administrator Check in Role Membership Removal
CVSS Score
5.2
EPSS Score
0.0%
EPSS Percentile
0th
Admidio is an open-source user management solution. Prior to version 5.0.9, Role::stopMembership() does not verify whether removing a user from the administrator role leaves zero administrators. The deprecated Membership::stopMembership() contains this safety check, but the current code path bypasses it. Any administrator can remove the last remaining other administrator, locking the entire system out of administrative access. The exploit does not require concurrent requests; sequential removals produce the same result. This issue has been patched in version 5.0.9.
| CWE | CWE-754 |
| Vendor | admidio |
| Product | admidio |
| Published | May 7, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High
Affected Versions
Admidio / admidio
< 5.0.9