Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Admidio | Admidio | < 5.0.6 |
Related Weaknesses (CWE)
References
- https://github.com/Admidio/admidio/commit/e47f70cc3cbcdb39635fdbaaef02d19f604b8cPatch
- https://github.com/Admidio/admidio/issues/1985Issue Tracking
- https://github.com/Admidio/admidio/security/advisories/GHSA-7pfv-hr63-h7cwMitigationVendor Advisory
FAQ
What is CVE-2026-30927?
CVE-2026-30927 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 OTH...
How severe is CVE-2026-30927?
CVE-2026-30927 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-30927?
Check the references section above for vendor advisories and patch information. Affected products include: Admidio Admidio.