CVE-2026-32756

published 2026-03-20

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…

Priority P2 64 high 8.8 CVSS 3.1

AV N AC L PR L UI N S U C H I H A H

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

2 ranges

Vendor	Product	Version range	Fixed in
admidio	admidio	< 5.0.7	5.0.7
admidio	admidio	>= 0 < 5.0.7	5.0.7

Detection & IOCs extracted from sources · hover to see the quote

• → Vulnerable file identified: the flaw exists within UploadHandlerFile.php in the Admidio Documents & Files module — monitor for unexpected file uploads processed through this handler ↗
• → Detect upload requests to Admidio's Documents & Files module that carry an intentionally invalid/malformed CSRF token alongside a file upload — this is the bypass mechanism ↗
• → Alert on PHP script files (e.g., .php, .php5, .phtml) uploaded to the Admidio Documents & Files module storage path, as successful exploitation results in a web-accessible PHP shell ↗

• · Exploitation requires an authenticated user with upload permissions — access control review of upload-capable accounts is a relevant mitigation layer ↗

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