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Vulnerability details

CVE-2025-64103

zitadel zitadel

Zitadel Bypass Second Authentication Factor

CVSS 4.0
8.7High

Official 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 scores

ScoreVersionSourceVector
8.7High 4.0 CVEProject cvelistV5 (CNA) (GitHub_M) 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

Affected products

VendorProductVersionsSource
zitadel zitadel >= 2.53.6, <= 2.53.9 CVEProject cvelistV5 (CNA)
zitadel zitadel >= 2.54.3, <= 2.54.10 CVEProject cvelistV5 (CNA)
zitadel zitadel >= 2.55.0, < 2.71.18 CVEProject cvelistV5 (CNA)
zitadel zitadel >= 3.0.0-rc.1, < 3.4.3 CVEProject cvelistV5 (CNA)
zitadel zitadel >= 4.0.0-rc.1, < 4.6.0 CVEProject cvelistV5 (CNA)

References and advisories

2
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Details

Published
2025-10-29
Last updated
2025-10-30
State
Published
Assigner (CNA)
GitHub_M

Exploit prediction (EPSS)

0.35%
Probability of exploitation in 30 days
29%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
Yes
Exploitation
None
Technical impact
Total

Weaknesses (CWE)

  • CWE-308
    Use of Single-factor Authentication
  • CWE-287
    Improper Authentication