CVE-2025-13881: Org.keycloak.services.resources.admin: keycloak: limited administrator can retrieve sensitive user attributes via admin api

Severity: low (CVSS 2.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-02 · updated 2026-06-17
Weakness: CWE-266

Description

A flaw was found in Keycloak Admin API. This vulnerability allows an administrator with limited privileges to retrieve sensitive custom attributes via the /unmanagedAttributes endpoint, bypassing User Profile visibility settings.

Affected products

Red Hat build of Keycloak 26.4: all versions — fixed in 26.4-10, 26.4-11, 26.4.9-1

How to fix

Upgrade to a fixed version: Red Hat build of Keycloak 26.4 26.4-10, 26.4-11, 26.4.9-1. Check the vendor advisory for mitigations.

References

https://access.redhat.com/errata/RHSA-2026:2365
https://access.redhat.com/errata/RHSA-2026:2366
https://access.redhat.com/security/cve/CVE-2025-13881
https://bugzilla.redhat.com/show_bug.cgi?id=2418330

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