Vulnerability · Published Mar 19, 2026 · Assigned by GitHub_M
CVE-2026-32756Admidio: Unrestricted File Upload via CSRF Token Validation Bypass in Documents & Files Module
High 8.8
In plain English
A high-severity unrestricted file upload in admidio from Admidio. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 64% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | admidio/admidio | 5.0.7 | GHSA-95cq-p4w2-32w5 |
Affected products (as reported)
Weakness: CWE-434 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/Admidio/admidio/security/advisories/GHSA-95cq-p4w2-32w5 x_refsource_CONFIRM
- https://github.com/Admidio/admidio/releases/tag/v5.0.7 x_refsource_MISC