CVE-2026-32756 Admidio: Unrestricted File Upload via CSRF Token Validation Bypass in Documents & Files Module

What is CVE-2026-32756?

CVE-2026-32756 is a high-severity vulnerability in admidio, published on 19 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

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.

Weakness: CWE-434

Which versions are affected by CVE-2026-32756?

2 open source packages ship an affected version, including admidio/admidio. It affects 1 product.

Products include Admidio Admidio.

How do I fix CVE-2026-32756?

Upgrade admidio/admidio to 5.0.7 or later.

Is CVE-2026-32756 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32756 exists.

Other vulnerabilities in admidio

• CVE-2024-37906 Admidio has Blind SQL Injection in ecard_send.php Critical 10.0
• CVE-2021-32630 Various Critical 9.6
• CVE-2026-32817 Admidio is Missing Authorization and CSRF Protection on Document and Folder Deletion Critical 9.1
• CVE-2024-38529 Admidio Vulnerable to RCE via Arbitrary File Upload in Message Attachment Critical 9.1
• CVE-2021-43810 Cross-site Scripting (XSS) when redirect an url High 8.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-95cq-p4w2-32w5.