What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-20 · updated 2026-06-17
• Weakness: CWE-434

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 products

• admidio: before 5.0.7 — fixed in 5.0.7

How to fix

Upgrade to a fixed version: admidio 5.0.7. Check the vendor advisory for mitigations.

References

• https://github.com/Admidio/admidio/releases/tag/v5.0.7
• https://github.com/Admidio/admidio/security/advisories/GHSA-95cq-p4w2-32w5

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