GHSA-xmcw-mv9p-7pq2: Duplicate Advisory Keycloak Error_description Injection On Error Vulnerability

MODERATE
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CVSS 4.3
CWE-79
Published
Advisory Summary

GHSA-xmcw-mv9p-7pq2 is a MODERATE (CVSS 4.3) keycloak error_description injection on error vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Duplicate Advisory libraries in the Maven ecosystem. The issue involves keycloak error_description injection on error pages that can trigger phishing attacks. Remediation is available by upgrading affected packages to version 26.2.9, 26.3.4.

GHSA-xmcw-mv9p-7pq2 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-xmcw-mv9p-7pq2
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Duplicate Advisory
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 4.3

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

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

How to Fix GHSA-xmcw-mv9p-7pq2

To remediate this vulnerability, upgrade all affected Duplicate Advisory 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-account-ui fixed: 26.2.9 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-account-ui</artifactId>
    <version>26.2.9</version>
</dependency>
org.keycloak:keycloak-account-ui fixed: 26.3.4 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-account-ui</artifactId>
    <version>26.3.4</version>
</dependency>
org.keycloak:keycloak-admin-ui fixed: 26.2.9 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-admin-ui</artifactId>
    <version>26.2.9</version>
</dependency>
org.keycloak:keycloak-admin-ui fixed: 26.3.4 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-admin-ui</artifactId>
    <version>26.3.4</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 GHSA-xmcw-mv9p-7pq2, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.keycloak

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 26.2.9), 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-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Duplicate Advisory, 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

### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-27gc-wj6x-9w55. This link is maintained to preserve external references. ### Original Description A flaw was found in Keycloak. Keycloak’s account console and other pages accept arbitrary text in the error_description query parameter. This text is directly rendered in error pages without validation or sanitization. While HTML encoding prevents XSS, an attacker can craft URLs with misleading messages (e.g., fake support phone numbers or URLs), which are displayed within the trusted Keycloak UI. This creates a phishing vector, potentially tricking users into contacting malicious actors.

GHSA-xmcw-mv9p-7pq2 Affected Duplicate Advisory Versions

4 component(s)
Fixed Versions:
26.2.926.3.4
Product / Package Ecosystem Affected Versions Fixed Version
org.keycloak:keycloak-account-ui
maven/org.keycloak/keycloak-account-ui
Maven
< 26.2.9
26.2.9
org.keycloak:keycloak-account-ui
maven/org.keycloak/keycloak-account-ui
Maven
≥ 26.3.0
< 26.3.4
26.3.4
org.keycloak:keycloak-admin-ui
maven/org.keycloak/keycloak-admin-ui
Maven
< 26.2.9
26.2.9
org.keycloak:keycloak-admin-ui
maven/org.keycloak/keycloak-admin-ui
Maven
≥ 26.3.0
< 26.3.4
26.3.4

References

NVD — GHSA-xmcw-mv9p-7pq2 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-10044
Duplicate Advisory Source Repository REPOSITORY
https://github.com/keycloak/keycloak/pull/42443
access.redhat.com/errata/rhsa-2025:16... WEB
https://access.redhat.com/errata/RHSA-2025:16399
access.redhat.com/errata/rhsa-2025:16... WEB
https://access.redhat.com/errata/RHSA-2025:16400
access.redhat.com/errata/rhsa-2025:19... WEB
https://access.redhat.com/errata/RHSA-2025:19923
access.redhat.com/errata/rhsa-2025:19... WEB
https://access.redhat.com/errata/RHSA-2025:19925
Duplicate Advisory Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2025-10044
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2393551

Frequently Asked Questions

What is GHSA-xmcw-mv9p-7pq2?
GHSA-xmcw-mv9p-7pq2 is a security vulnerability in Duplicate Advisory involving Keycloak error_description injection on error pages that can trigger phishing attacks under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to 26.2.9, 26.3.4 across affected packages: org.keycloak:keycloak-account-ui, org.keycloak:keycloak-admin-ui.
What version fixes GHSA-xmcw-mv9p-7pq2?
Upgrading to 26.2.9, 26.3.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is keycloak-account-ui affected?
Yes, org.keycloak:keycloak-account-ui is affected in releases prior to 26.2.9, 26.3.4. Upgrade your dependency to 26.2.9, 26.3.4 or later.
Is keycloak-admin-ui affected?
Yes, org.keycloak:keycloak-admin-ui is affected in releases prior to 26.2.9, 26.3.4. Upgrade your dependency to 26.2.9, 26.3.4 or later.
What is the CVSS score of GHSA-xmcw-mv9p-7pq2?
GHSA-xmcw-mv9p-7pq2 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.
What CWE is associated with GHSA-xmcw-mv9p-7pq2?
GHSA-xmcw-mv9p-7pq2 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Maven dependencies for GHSA-xmcw-mv9p-7pq2?
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-xmcw-mv9p-7pq2",
  "modified" : "2025-12-20T05:46:57Z",
  "published" : "2025-09-05T21:32:38Z",
  "withdrawn" : "2025-10-16T22:34:39Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Keycloak error_description injection on error pages that can trigger phishing attacks",
  "details" : "### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-27gc-wj6x-9w55. This link is maintained to preserve external references.\n\n### Original Description\nA flaw was found in Keycloak. Keycloak’s account console and other pages accept arbitrary text in the error_description query parameter. This text is directly rendered in error pages without validation or sanitization. While HTML encoding prevents XSS, an attacker can craft URLs with misleading messages (e.g., fake support phone numbers or URLs), which are displayed within the trusted Keycloak UI. This creates a phishing vector, potentially tricking users into contacting malicious actors.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-account-ui"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "26.2.9"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-account-ui"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "26.3.0"
      }, {
        "fixed" : "26.3.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-admin-ui"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "26.2.9"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-admin-ui"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "26.3.0"
      }, {
        "fixed" : "26.3.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-10044"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak/pull/42443"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2025:16399"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2025:16400"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2025:19923"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2025:19925"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2025-10044"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2393551"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-10-16T22:34:39Z",
    "nvd_published_at" : "2025-09-05T20:15:34Z"
  }
}