CVE-2026-30927

MEDIUM

5.4

Description

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 GET parameter. The condition uses || (OR), meaning if possibleToParticipate() returns true (event is open for participation), ANY user - not just leaders - can specify a different user_uuid and register/cancel participation for that user. The code then operates on $user->getValue('usr_id') (the target user from user_uuid) rather than the current user. This vulnerability is fixed in 5.0.6.

CVE Details

CVSS v3.1 Score5.4

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published3/10/2026

Last Modified3/13/2026

Sourcenvd

Honeypot Sightings0

Affected Products

admidio:admidio

Weaknesses (CWE)

CWE-639

References

https://github.com/Admidio/admidio/commit/e47f70cc3cbcdb39635fdbaaef02d19f604b8c3e(security-advisories@github.com)

https://github.com/Admidio/admidio/issues/1985(security-advisories@github.com)

https://github.com/Admidio/admidio/security/advisories/GHSA-7pfv-hr63-h7cw(security-advisories@github.com)

IOC Correlations

No correlations recorded

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