TYPO3 CMS MFA Code Reset Bypass via Empty String
CVE-2026-4208 Published on March 17, 2026
Authentication Bypass in extension "E-Mail MFA Provider" (mfa_email)
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.
Weakness Type
What is an Insecure Direct Object Reference / IDOR Vulnerability?
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
CVE-2026-4208 has been classified to as an Insecure Direct Object Reference / IDOR vulnerability or weakness.
Affected Versions
TYPO3 Extension "E-Mail MFA Provider":- Before and including 1.0.5 is affected.
- Version 2.0.0 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.