Arbitrary file upload in Admidio
CVE-2026-32756
Admidio is an open-source user management solution. Versions 5.0.6 and below contain a critical unrestricted file upload vulnerability in the Documents & Files module. Due to a design flaw in how CSRF token validation and file extension verification interact within UploadHandlerFile.php, an authenticated user with upload permissions can bypass file extension restrictions by intentionally submitting an invalid CSRF token. This allows the upload of arbitrary file types, including PHP scripts, which may lead to Remote Code Execution on the server, resulting in full server compromise, data exfiltration, and lateral movement. This issue has been fixed in version 5.0.7.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (59.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: -0.000
Affected products
- Admidio — versions < 5.0.7
Weakness classification (CWE)
References
- github.com/Admidio/admidio/security/advisories/GHSA-95cq-p4w2-32w5 (Exploit, Mitigation, Vendor Advisory)
- github.com/Admidio/admidio/releases/tag/v5.0.7 (Product, Patch)
Frequently asked questions
- What is CVE-2026-32756?
- CVE-2026-32756 is a high-severity vulnerability in Admidio, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2026-03-20.
- How severe is CVE-2026-32756?
- High severity. CVSS v3 base score is 8.8 out of 10.