EUVD-2026-17628
GHSA-ph84-r98x-2j22
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N
Lifecycle Timeline
4Description
Admidio is an open-source user management solution. Prior to version 5.0.8, the create_user, assign_member, and assign_user action modes in modules/registration.php approve pending user registrations via GET request without validating a CSRF token. Unlike the delete_user mode in the same file (which correctly validates the token), these three approval actions read their parameters from $_GET and perform irreversible state changes without any protection. An attacker who has submitted a pending registration can extract their own user UUID from the registration confirmation email URL, then trick any user with the rol_approve_users right into visiting a crafted URL that automatically approves the registration. This bypasses the manual registration approval workflow entirely. This issue has been patched in version 5.0.8.
Analysis
Admidio prior to version 5.0.8 allows attackers with pending registration status to bypass CSRF protections and trick administrators with approval rights into automatically approving registrations via malicious URLs, enabling unauthorized account activation without manual review. The vulnerability affects the create_user, assign_member, and assign_user action modes in modules/registration.php, which process GET requests without token validation unlike the delete_user mode in the same file. …
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