CVE-2026-4208 Details
Description
The extension fails to properly reset the generated MFA code after successful authentication. This leads to a possible MFA bypass for future login attempts by providing an empty string as MFA code to the extensions MFA provider.
An authentication bypass vulnerability has been identified in the TYPO3 extension 'E-Mail MFA Provider' (mfa_email) versions 2.0.0 and below. The issue arises because the extension does not properly reset the generated multi-factor authentication (MFA) code after successful authentication. This flaw allows users to bypass MFA in future login attempts by submitting an empty string as the MFA code, but only if 'E-Mail MFA Provider' is not set as the default MFA provider and at least one other MFA provider is available.
Users are advised to uninstall the 'E-Mail MFA Provider' extension and delete its folder from their TYPO3 installation. Alternative extensions can be searched for in the TYPO3 Extension Repository.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 17, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://typo3.org/security/advisory/typo3-ext-sa-2026-007 | TYPO3 | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-639 | Authorization Bypass Through User-Controlled Key | TYPO3 |
Affected Products
| Product | Versions |
|---|---|
| mrsilaz mfa mail | < 1.0.7 2.0.0 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | TYPO3 |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 25, 2026 | Initial Analysis | [email protected] |
| Mar 17, 2026 | New CVE Received | TYPO3 |