Auth bypass in Admidio
CVE-2026-109329
Admidio 4.3.2 through 4.3.17 and 5.0.0 before 5.0.15 contains a broken access control vulnerability that allows role administrators to assign users to roles in other organizations. Attackers can submit crafted assign requests to members_assignment.php with a foreign role UUID to gain privileged membership, log into that organization, and edit its user profiles.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/Admidio/admidio/security/advisories/GHSA-ggch-5cpv-rvqx (vendor-advisory)
- www.vulncheck.com/advisories/admidio-4.3.2-through-4.3.17-and-5.0.0-before-5.0… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109329?
- CVE-2026-109329 is a medium-severity vulnerability in Admidio, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-10-12.
- How severe is CVE-2026-109329?
- Medium severity. CVSS v3 base score is 6.5 out of 10.