CVE-2026-41660: Admidio: Inverted 2FA Reset Authorization Check Lets Group Leaders Strip Admin TOTP

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-07 · updated 2026-06-17
Weakness: CWE-863

Description

Admidio is an open-source user management solution. Prior to version 5.0.9, a logic error in Admidio's two-factor authentication reset inverts the authorization check. Non-admin users cannot remove their own TOTP configuration, but they can remove other users' TOTP, including administrators. A group leader with profile edit rights on an admin account can strip that admin's 2FA. This issue has been patched in version 5.0.9.

Affected products

admidio: before 5.0.9

References

https://github.com/Admidio/admidio/releases/tag/v5.0.9
https://github.com/Admidio/admidio/security/advisories/GHSA-rh3w-4ccx-prf9
https://github.com/Admidio/admidio/security/advisories/GHSA-rh3w-4ccx-prf9

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