Vulnerability Description
Starting from 2.53.6, 2.54.3, and 2.55.0, Zitadel only required multi factor authentication in case the login policy has either enabled requireMFA or requireMFAForLocalUsers. If a user has set up MFA without this requirement, Zitadel would consider single factor auhtenticated sessions as valid as well and not require multiple factors. Bypassing second authentication factors weakens multifactor authentication and enables attackers to bypass the more secure factor. An attacker can target the TOTP code alone, only six digits, bypassing password verification entirely and potentially compromising accounts with 2FA enabled. This vulnerability is fixed in 4.6.0, 3.4.3, and 2.71.18.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Zitadel | Zitadel | >= 2.53.6, <= 2.53.9 |
Related Weaknesses (CWE)
References
- https://github.com/zitadel/zitadel/commit/b284f8474eed0cba531905101619e7ae796315Patch
- https://github.com/zitadel/zitadel/security/advisories/GHSA-cfjq-28r2-4jv5Vendor Advisory
FAQ
What is CVE-2025-64103?
CVE-2025-64103 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Starting from 2.53.6, 2.54.3, and 2.55.0, Zitadel only required multi factor authentication in case the login policy has either enabled requireMFA or requireMFAForLocalUsers. If a user has set up MFA ...
How severe is CVE-2025-64103?
CVE-2025-64103 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-64103?
Check the references section above for vendor advisories and patch information. Affected products include: Zitadel Zitadel.