CVE-2025-1391: Access Control Flaw (CVSS 5.4)

Description

A flaw was found in the Keycloak organization feature, which allows the incorrect assignment of an organization to a user if their username or email matches the organization’s domain pattern. This issue occurs at the mapper level, leading to misrepresentation in tokens. If an application relies on these claims for authorization, it may incorrectly assume a user belongs to an organization they are not a member of, potentially granting unauthorized access or privileges.

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CVSS v3.1 Score

5.4

MEDIUM

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

Weakness Type (CWE)

CWE-284 CWE-284

References

Other References

https://access.redhat.com/errata/RHSA-2025:2544 https://access.redhat.com/errata/RHSA-2025:2545 https://access.redhat.com/security/cve/CVE-2025-1391 https://bugzilla.redhat.com/show_bug.cgi?id=2346082 https://github.com/keycloak/keycloak/issues/37169 https://github.com/keycloak/keycloak/pull/37235

Frequently Asked Questions

What is CVE-2025-1391? +

A flaw was found in the Keycloak organization feature, which allows the incorrect assignment of an organization to a user if their username or email matches the organization’s domain pattern. This issue occurs at the mapper level, leading to misrepresentation in tokens. If an application relies on these claims for authorization, it may incorrectly assume a user belongs to an organization they are not a member of, potentially granting unauthorized access or privileges. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2025-1391? +

CVE-2025-1391 has a CVSS v3.1 score of 5.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2025-1391? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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