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CVE-2026-41662

Admidio: Missing Minimum Administrator Check in Role Membership Removal

Published: May 7, 2026Updated: May 7, 2026 Sources: CVE List NVDCWE-754
NVD MITRE
5.2CVSSMEDIUM
EPSS Score
0.3%
Top 80.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

Description

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.

CVSS Vector Breakdown

AV:NAC:LPR:HUI:RS:UC:NI:LA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:HAvailability
High
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Weaknesses

CWE-754

Affected Products

admidioAdmidio
On-prem
Enterprise Software / collaboration-groupware
admidiooss-projectEnterprise Softwareaka admidio/admidio

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://github.com/Admidio/admidio/releases/tag/v5.0.9
github.com
https://github.com/Admidio/admidio/security/advisories/GHSA-c7xm-r6vj-8vg6
github.com

Timeline

Published
May 7, 2026
Last Updated
May 7, 2026

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