Auth bypass in Admidio

CVE-2026-30927

Admidio is an open-source user management solution. Prior to 5.0.6, in modules/events/events_function.php, the event participation logic allows any user who can participate in an event to register OTHER users by manipulating the user_uuid…

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.000 (5.3th percentile) — read the EPSS interpretation.

Affected products

Admidio — versions < 5.0.6

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

https://github.com/Admidio/admidio/security/advisories/GHSA-7pfv-hr63-h7cw (x_refsource_CONFIRM)
https://github.com/Admidio/admidio/issues/1985 (x_refsource_MISC)
https://github.com/Admidio/admidio/commit/e47f70cc3cbcdb39635fdbaaef02d19f604b8c3e (x_refsource_MISC)