Auth bypass in Admidio

CVE-2026-41671

Admidio is an open-source user management solution. Prior to version 5.0.9, the OIDC token introspection endpoint (/modules/sso/index.php/oidc/introspect) always returns {"active": true} for every request, regardless of whether a valid tok…

Vulnerability class: Broken Authentication

EPSS: 0.000 (5.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-41671?
CVE-2026-41671 is a medium-severity vulnerability in Admidio, classified under Improper Authentication. CVSS score: 6.8/10. Published 2026-05-07.
How severe is CVE-2026-41671?
Medium severity. CVSS v3 base score is 6.8 out of 10.