What’s Vulnerable › Vulnerabilities

CVE-2021-3513

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-08-22 · updated 2026-06-17
• Weakness: CWE-522

Description

A flaw was found in keycloak where a brute force attack is possible even when the permanent lockout feature is enabled. This is due to a wrong error message displayed when wrong credentials are entered. The highest threat from this vulnerability is to confidentiality.

Affected products

• Keycloak: before 13.0.0 — fixed in 13.0.0

How to fix

Upgrade to a fixed version: Keycloak 13.0.0. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/security/cve/CVE-2021-3513
• https://bugzilla.redhat.com/show_bug.cgi?id=1953439
• https://access.redhat.com/security/cve/CVE-2021-3513
• https://bugzilla.redhat.com/show_bug.cgi?id=1953439

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