[20260511] - Core - MFA Authentication Bypass

Project: Joomla!
SubProject: CMS
Impact: High
Severity: Moderate
Probability: Moderate
Versions: 4.0.0-5.4.5,6.0.0-6.1.0
Exploit type: Authentication Bypass
Reported Date: 2026-04-01
Fixed Date: 2026-05-26
CVE Number: CVE-2026-48896

Description

Insufficient state checks lead to a vector that allows to bypass 2FA checks.

Affected Installs

Joomla! CMS versions 4.0.0-5.4.5,6.0.0-6.1.0

Solution

Upgrade to version 5.4.6,6.1.1

Contact

The JSST at the Joomla! Security Centre.

Reported By: Doyensec in collaboration with Claude and Anthropic Research, Christos Papakonstantinou, Cantina