CVE-2025-64102

Zitadel allows brute-forcing authentication factors

State: Published
Severity: 7.7 High
Published: Oct 29, 2025
Updated: Oct 30, 2025
Reserved: Oct 27, 2025

Description

Zitadel is open-source identity infrastructure software. Prior to 4.6.0, 3.4.3, and 2.71.18, an attacker can perform an online brute-force attack on OTP, TOTP, and passwords. While Zitadel allows preventing online brute force attacks in scenarios like TOTP, Email OTP, or passwords using a lockout mechanism. The mechanism is not enabled by default and can cause a denial of service for the corresponding user if enabled. Additionally, the mitigation strategies were not fully implemented in the more recent resource-based APIs. This vulnerability is fixed in 4.6.0, 3.4.3, and 2.71.18.

Scores

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

Weaknesses

CWE-307 Improper Restriction of Excessive Authentication Attempts

Affected Products

Product	Versions
zitadelzitadel	>= 4.0.0-rc.1, < 4.6.0Affected >= 3.0.0-rc.1, < 3.4.3Affected >= 2.0.0, < 2.71.18Affected

References

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