CVE-2026-73337
Analyzed Analyzed - Analysis Complete

Authentication Bypass in Joomla Core via Insufficient State Checks

Publication date: 2026-08-18

Last updated on: 2026-09-03

Assigner: Joomla! Project

Description
Joomla! Core - [20260807] - MFA Authentication Bypass in Joomla 4.0.0-5.4.7 and 6.0.0-6.1.2 - Insufficient state checks lead to a vector that allows to bypass 2FA checks.

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Meta Information

Published
2026-08-18
Last Modified
2026-09-03
Generated
2026-09-08
AI Q&A
2026-08-18
EPSS Evaluated
2026-09-06
NVD
CVE-2026-73337
EUVD
EUVD-2026-61029

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
joomla joomla! From 4.0.0 (inc) to 5.4.8 (exc)
joomla joomla! From 6.0.0 (inc) to 6.1.3 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-287 When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Attack-Flow Graph

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Executive Summary

This vulnerability is an authentication bypass in Joomla! CMS that allows attackers to bypass Multi-Factor Authentication (MFA) protections. It occurs due to insufficient state checks in versions 4.0.0-5.4.7 and 6.0.0-6.1.2.

Detection Guidance

Check Joomla version using command: grep -r 'Joomla' /var/www/html/administrator/components/com_admin/version.php. If version is between 4.0.0-5.4.7 or 6.0.0-6.1.2, the system is vulnerable.

Impact Analysis

An attacker could exploit this to bypass MFA and gain unauthorized access to a Joomla! site, potentially compromising sensitive data or administrative controls.

Compliance Impact

The vulnerability allows authentication bypass for MFA in Joomla, potentially enabling unauthorized access to sensitive data. This could impact compliance with GDPR and HIPAA by compromising data protection requirements related to access controls and authentication mechanisms.

Mitigation Strategies

Upgrade Joomla to version 5.4.8 or 6.1.3 immediately. Apply patches from Joomla Security Centre. Verify MFA functionality after update.

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