CVE-2025-1391

Keycloak-services: improper authorization in keycloak organization mapper allows unauthorized organization claims

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.

Category

5.4
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.01%
Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: Red Hat Red Hat Build of Keycloak
Affected: Red Hat Red Hat build of Keycloak 26.0
Affected: Red Hat Red Hat build of Keycloak 26.0
Affected: Red Hat Red Hat build of Keycloak 26.0
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2025:2544 vendor advisory
https://access.redhat.com/errata/RHSA-2025:2545 vendor advisory
https://access.redhat.com/security/cve/CVE-2025-1391 vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=2346082 issue tracking

Frequently Asked Questions

What is the severity of CVE-2025-1391?
CVE-2025-1391 has been scored as a medium severity vulnerability.
How to fix CVE-2025-1391?
To fix CVE-2025-1391, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-1391 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-1391 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-1391?
CVE-2025-1391 affects Red Hat Red Hat Build of Keycloak, Red Hat Red Hat build of Keycloak 26.0, Red Hat Red Hat build of Keycloak 26.0, Red Hat Red Hat build of Keycloak 26.0.
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