Auth bypass in Admidio
CVE-2026-32818
Admidio is an open-source user management solution. In versions 5.0.0 through 5.0.6, the forum module in Admidio does not verify whether the current user has permission to delete forum topics or posts. Both the topic_delete and post_delete actions in forum.php only validate the CSRF token but perform no authorization check before calling delete(). Any authenticated user with forum access can delete any topic (with all its posts) or any individual post by providing its UUID. This is inconsistent with the save/edit operations, which properly check isAdministratorForum() and ownership before allowing modifications. Any logged-in user can permanently and irreversibly delete any forum topic (including all its posts) or any individual post by simply knowing its UUID (which is publicly visible in URLs), completely bypassing authorization checks. This issue has been fixed in version 5.0.7.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (24.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Admidio — versions < 5.0.7
Weakness classification (CWE)
References
- github.com/Admidio/admidio/security/advisories/GHSA-g375-5wmp-xr78 (Exploit, Mitigation, Vendor Advisory)
- github.com/Admidio/admidio/releases/tag/v5.0.7 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-32818?
- CVE-2026-32818 is a medium-severity vulnerability in Admidio, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-03-19.
- How severe is CVE-2026-32818?
- Medium severity. CVSS v3 base score is 6.5 out of 10.