CVE-2026-111895

EUVD-2026-103324

17.10.2026, 19:16

phpMyFAQ 3.2.0 before 4.0.0 and 4.0.2 before 4.2.0-beta contains an authentication bypass in its Microsoft Entra ID login flow, which links users by the mutable preferred_username claim and whose AuthEntraId::create() ignores the duplicate-login exception while continuing with the existing local account. Attackers controlling an Entra identity in the configured tenant with a matching preferred_username can take over that local account, including super-admin accounts.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	6.8 MEDIUM	NETWORK	HIGH	LOW	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Awaiting analysis

This vulnerability is currently awaiting analysis.

Base Score

CVSS 3.x

EPSS Score

Percentile: 20.89%

Common Weakness Enumeration

CWE-287 - Improper Authentication
When an actor claims to have a given identity, the software does not prove or insufficiently proves that the claim is correct.

References

https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-6hhv-gc4g-f4r7

https://www.vulncheck.com/advisories/phpmyfaq-3.2.0-before-4.0.0-and-4.0.2-before-4.2.0-beta-account-takeover-via-entra-id-preferred-username

https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-6hhv-gc4g-f4r7