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Vulnerability record · CVE-2026-69091 · published 3 August 2026

CVE-2026-69091: Missing authentication for critical function vulnerability

Admidio before 5.0.11 contains an authentication bypass vulnerability in the forum module when configured in login-only mode. The access control logic in modules/forum.php fails to validate the login-only configuration state, allowing unauthenticated attackers to read forum topics and posts by directly accessing the module with read-only parameters.

8.7 CVSS 4.0 High EPSS 0.61% · top 52.7% CWE-306 · Missing authentication for critical function Deferred
8.7CVSS 4.0 base score
0.61%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
9 Sep 2026Last modified by NVD

Description

Admidio before 5.0.11 contains an authentication bypass vulnerability in the forum module when configured in login-only mode. The access control logic in modules/forum.php fails to validate the login-only configuration state, allowing unauthenticated attackers to read forum topics and posts by directly accessing the module with read-only parameters.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/Admidio/admidio/security/advisories/GHSA-cf48-6jrq-gjcm
https://www.vulncheck.com/advisories/admidio-before-authentication-bypass-via-forum-php

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Source: NIST National Vulnerability Database (record CVE-2026-69091), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.