EUVD-2026-61029
GHSA-9r3f-xqw4-c5pc
Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/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:X/V:X/RE:X/U:X
AC:H reflects CVSS 4.0 AT:P (specific state condition required); PR:N per vendor vector despite first-factor credential pre-condition; no confidentiality or availability impact scoped from auth bypass alone.
Primary rating from Vendor (Joomla).
CVSS VectorVendor: Joomla
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/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:X/V:X/RE:X/U:X
Lifecycle Timeline
2DescriptionCVE.org
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.
AnalysisAI
Multi-factor authentication bypass in Joomla! CMS versions 4.0.0 through 5.4.7 and 6.0.0 through 6.1.2 allows remote attackers to circumvent 2FA controls and gain authenticated access using only the first-factor credential. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires: (1) the target Joomla site must be running a version in the affected ranges (4.0.0-5.4.7 or 6.0.0-6.1.2); (2) at least one user account on the target site must have MFA enabled - sites where MFA is not configured or globally disabled are not exposed to this specific bypass; (3) the attacker must possess valid first-factor credentials (username and password) for the targeted account, since the bypass operates at the MFA step, not the password step. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.2 reflects a high-severity integrity impact with network accessibility and no required privileges, but the AT:P metric signals that exploitation is not trivially repeatable against every session - specific conditions (likely related to the authentication state machine) must be met. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker obtains valid Joomla account credentials (username and password) for a target site through phishing or credential stuffing, then initiates the login flow. Rather than completing the MFA challenge presented after first-factor success, the attacker crafts or sequences requests to exploit the insufficient state check, causing the application to accept the session as fully authenticated without verifying the second factor. … |
| Remediation | Upgrade to a patched release of Joomla! … Detailed patch versions, workarounds, and compensating controls in full report. |
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Within 24 hours, inventory all Joomla! …
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External POC / Exploit Code
Leaving vuln.today