CVE-2025-64102

critical

Zitadel is open-source identity infrastructure software.

Vendor / product: Zitadel — zitadel

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.

CVSS

9.8

9.8 (CVSS v3.1)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity source: NVD CVSS v3.1 (nvd@nist.gov)

Timeline (UTC)

Published: 2025-10-29 19:15

Modified: 2026-10-19 13:10

NVD status: Analyzed

Last synced 2 days ago

Verified against the source API 2026-10-27 07:06 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

zitadel / zitadel <2.71.18, ≥3.0.0 <3.4.3, ≥4.0.0 <4.6.0

Weakness classification (CWE)

CWE-307

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Vendor advisory: https://github.com/zitadel/zitadel/security/advisories/GHSA-xrw9-r35x-x878

Patch / mitigation: https://github.com/zitadel/zitadel/commit/b8db8cdf9cc8ea13f461758aef12457f8b7d972a

References

https://github.com/zitadel/zitadel/commit/b8db8cdf9cc8ea13f461758aef12457f8b7d972a security-advisories@github.com
https://github.com/zitadel/zitadel/security/advisories/GHSA-xrw9-r35x-x878 security-advisories@github.com

Data sources

NVD CVE API 2.0 — fetched 2026-10-27 07:06 UTC · record ↗

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Understanding CVEs and CVSS Scores

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CVE-2025-64717 CVE-2025-64103