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.
History

Thu, 30 Oct 2025 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 30 Oct 2025 14:45:00 +0000

Type Values Removed Values Added
First Time appeared Zitadel
Zitadel zitadel
Vendors & Products Zitadel
Zitadel zitadel

Wed, 29 Oct 2025 19:00:00 +0000

Type Values Removed Values Added
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.
Title Zitadel Bypass Second Authentication Factor
Weaknesses CWE-287
CWE-308
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2025-10-29T18:43:46.934Z

Updated: 2025-10-30T14:51:19.189Z

Reserved: 2025-10-27T15:26:14.127Z

Link: CVE-2025-64103

cve-icon Vulnrichment

Updated: 2025-10-30T14:51:15.580Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-10-29T19:15:39.067

Modified: 2025-10-30T15:03:13.440

Link: CVE-2025-64103

cve-icon Redhat

No data.