Multi-Factor Authentication Bypass in Zitadel Policy Enforcement
CVE-2025-64103

8.7HIGH

Key Information:

Vendor

Zitadel

Status
Zitadel
Vendor
CVE Published:
29 October 2025

What is CVE-2025-64103?

Zitadel's authentication mechanism starting from versions 2.53.6, 2.54.3, and 2.55.0 allowed single-factor authenticated sessions under certain configurations, neglecting the requisite multi-factor authentication (MFA). Users who established MFA without enforcing its necessity could be exposed to attacks focusing solely on compromised TOTP codes, which consist of just six digits. This loophole undermines the efficacy of MFA, as attackers can circumvent the password protection entirely, putting accounts protected by 2FA at risk. The vulnerability has been addressed in versions 4.6.0, 3.4.3, and 2.71.18.

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Affected Version(s)

zitadel >= 4.0.0-rc.1, < 4.6.0 < 4.0.0-rc.1, 4.6.0

zitadel >= 3.0.0-rc.1, < 3.4.3 < 3.0.0-rc.1, 3.4.3

zitadel >= 2.55.0, < 2.71.18 < 2.55.0, 2.71.18

References

https://github.com/zitadel/zitadel/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/zitadel/zitadel/commit/b284f8474eed0cb...
x_refsource_MISC

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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