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.

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

EPSS: 0.010 (58.7th percentile) — read the EPSS interpretation.

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.

Affected products

Admidio — versions < 5.0.7

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)
security-advisories@github.com (Product, Patch, x_refsource_MISC)

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.