High severity · published Mar 17, 2026
CVE-2026-4208
Authentication Bypass in extension "E-Mail MFA Provider" (mfa_email)
8.8
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EE
Extension "E-Mail MFA Provider" · TYPO3
through 1.0.5; 2.0.0 · source: vendor
MM
Mfa Mail · Mrsilaz
before 1.0.7; 2.0.0 · source: NVD