CVE-2026-4208 PUBLISHED

Authentication Bypass in extension "E-Mail MFA Provider" (mfa_email)

Assigner: TYPO3
Reserved: 15.03.2026 Published: 17.03.2026 Updated: 17.03.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 7.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	High	Integrity	High	Integrity	None
Attack Requirements	Present	Availability	High	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	TYPO3
Product	Extension "E-Mail MFA Provider"
Versions	Default: unaffected affected from 0 to 2.0.0 (incl.)

Credits

Jan Holtkötter reporter

References

https://typo3.org/security/advisory/typo3-ext-sa-2026-007

Problem Types

CWE-639 CWE

Impacts

CAPEC-115 Authentication Bypass