CVE-2025-13881: Keycloak services Keycloak Admin API Allows An Vulnerability

LOW
Advisory Identifier: GHSA-g78x-7vwx-9f58
Share
CVSS 2.7
CWE-266
Published
Advisory Summary

CVE-2025-13881 is a LOW (CVSS 2.7) keycloak admin api allows an vulnerability (CWE-266: Incorrect Privilege Assignment) affecting Keycloak services libraries in the Maven ecosystem. The issue involves keycloak admin api allows an administrator with limited privileges to retrieve sensitive custom attributes. Remediation is available by upgrading affected packages to version 26.5.2, 26.4.9.

CVE-2025-13881 at a Glance

CVE Identifier CVE-2025-13881
GHSA Identifier GHSA-g78x-7vwx-9f58
Severity LOW
CVSS v3.1 Base Score 2.7
CWE Classification CWE-266: Incorrect Privilege Assignment
Affected Product Keycloak services
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 2.7

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required High (PR:H)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2025-13881

To remediate this vulnerability, upgrade all affected Keycloak services dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.keycloak:keycloak-services fixed: 26.5.2 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-services</artifactId>
    <version>26.5.2</version>
</dependency>
org.keycloak:keycloak-services fixed: 26.4.9 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-services</artifactId>
    <version>26.4.9</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.keycloak

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2025-13881, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.keycloak

Analyze the terminal output to locate any version of Keycloak services in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 26.5.2), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.keycloak command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-266: Incorrect Privilege Assignment, where a product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor. In Keycloak services, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2025-13881 Affected Keycloak services Versions

2 component(s)
Fixed Versions:
26.5.226.4.9
Product / Package Ecosystem Affected Versions Fixed Version
org.keycloak:keycloak-services
maven/org.keycloak/keycloak-services
Maven
≥ 26.5.0
< 26.5.2
26.5.2
org.keycloak:keycloak-services
maven/org.keycloak/keycloak-services
Maven
< 26.4.9
26.4.9

References

NVD — CVE-2025-13881 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-13881
Keycloak services Source Repository REPOSITORY
https://github.com/keycloak/keycloak/issues/45873
Keycloak services Source Repository REPOSITORY
https://github.com/keycloak/keycloak/pull/45427
Security Fix Commit FIX COMMIT
https://github.com/keycloak/keycloak/commit/1d7ab8d5fb1403902f5152820a8fc734d38b08d2
Security Fix Commit FIX COMMIT
https://github.com/keycloak/keycloak/commit/c5c83d6604d4c73139f38fce3ed7b7c4c38c09f2
access.redhat.com/errata/rhsa-2026:23... WEB
https://access.redhat.com/errata/RHSA-2026:2365
access.redhat.com/errata/rhsa-2026:23... WEB
https://access.redhat.com/errata/RHSA-2026:2366
Keycloak services Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2025-13881
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2418330
Keycloak services Source Repository REPOSITORY
https://github.com/keycloak/keycloak

Frequently Asked Questions

What is CVE-2025-13881?
CVE-2025-13881 is a security vulnerability in Keycloak services involving Keycloak Admin API allows an administrator with limited privileges to retrieve sensitive custom attributes under CWE-266: Incorrect Privilege Assignment.
Which Keycloak services versions are affected?
Affected versions include releases prior to 26.5.2, 26.4.9 across affected packages: org.keycloak:keycloak-services.
What version fixes CVE-2025-13881?
Upgrading to 26.5.2, 26.4.9 (or the latest patched release for your respective branch) resolves the vulnerability.
Is keycloak-services affected?
Yes, org.keycloak:keycloak-services is affected in releases prior to 26.5.2, 26.4.9. Upgrade your dependency to 26.5.2, 26.4.9 or later.
What is the CVSS score of CVE-2025-13881?
CVE-2025-13881 has a CVSS v3.1 base score of 2.7 (LOW) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2025-13881?
CVE-2025-13881 is classified under CWE-266: Incorrect Privilege Assignment (A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.).
How can I check Maven dependencies for CVE-2025-13881?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.keycloak'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-g78x-7vwx-9f58",
  "modified" : "2026-02-13T21:51:17Z",
  "published" : "2026-02-02T06:30:53Z",
  "aliases" : [ "CVE-2025-13881" ],
  "summary" : "Keycloak Admin API allows an administrator with limited privileges to retrieve sensitive custom attributes",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-services"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "26.5.0"
      }, {
        "fixed" : "26.5.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-services"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "26.4.9"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-13881"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak/issues/45873"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak/pull/45427"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak/commit/1d7ab8d5fb1403902f5152820a8fc734d38b08d2"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak/commit/c5c83d6604d4c73139f38fce3ed7b7c4c38c09f2"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:2365"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:2366"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2025-13881"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2418330"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/keycloak/keycloak"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-266" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-02T20:59:06Z",
    "nvd_published_at" : "2026-02-02T06:16:19Z"
  }
}