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CVE-2025-64102

Zitadel vulnerability

9.8 CRITICALEPSS 0.37%
  1. Published29 Oct 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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Zitadel≥ 3.0.0 < 3.4.3 · ≥ 4.0.0 < 4.6.0 · < 2.71.18

Remediation

Fixed in
Zitadel≥ 3.4.3

References

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Frequently asked

Is CVE-2025-64102 being actively exploited?

CVE-2025-64102 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.37%.

How severe is CVE-2025-64102?

CVE-2025-64102 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.37% probability of exploitation.

Which products are affected by CVE-2025-64102?

Affected products include Zitadel.

How do I fix CVE-2025-64102?

Upgrade affected software to a fixed version, for example Zitadel 3.4.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-64102 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.