Auth bypass in Mrsilaz Mfa Mail
CVE-2026-4208
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (36.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- Mrsilaz Mfa Mail — versions 2.0.0
- TYPO3 Extension "E-Mail Mfa Provider" — versions 0, 2.0.0
Weakness classification (CWE)
References
- f4fb688c-4412-4426-b4b8-421ecf27b14a (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-4208?
- CVE-2026-4208 is a high-severity vulnerability in Mrsilaz Mfa Mail, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.8/10. Published 2026-03-17.
- How severe is CVE-2026-4208?
- High severity. CVSS v3 base score is 8.8 out of 10.