CVE-2022-4361: Keycloak services Cross-Site Scripting Vulnerability

CRITICAL
Advisory Identifier: GHSA-3p62-6fjh-3p5h
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CVSS 10.0
CWE-81 CWE-79
Published
Advisory Summary

CVE-2022-4361 is a CRITICAL (CVSS 10.0) cross-site scripting vulnerability (CWE-81: Improper Neutralization of Script in an Error Message Web Page) affecting Keycloak services libraries in the Maven ecosystem. The issue involves keycloak vulnerable to cross-site scripting when validating uri-schemes on saml and oidc. Remediation is available by upgrading affected packages to version 21.1.2.

CVE-2022-4361 at a Glance

CVE Identifier CVE-2022-4361
GHSA Identifier GHSA-3p62-6fjh-3p5h
Severity CRITICAL
CVSS v3.1 Base Score 10.0
CWE Classification CWE-81: Improper Neutralization of Script in an Error Message Web Page
Affected Product Keycloak services
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 10.0

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:N/S:C/C:H/I:H/A:H).

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

How to Fix CVE-2022-4361

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: 21.1.2 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-services</artifactId>
    <version>21.1.2</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-2022-4361, 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 21.1.2), 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-81: Improper Neutralization of Script in an Error Message Web Page, where the product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters that could be interpreted as web-scripting elements when they are sent to an error page. 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

AssertionConsumerServiceURL is a Java implementation for SAML Service Providers (org.keycloak.protocol.saml). Affected versions of this package are vulnerable to Cross-site Scripting (XSS). AssertionConsumerServiceURL allows XSS when sending a crafted SAML XML request.

CVE-2022-4361 Affected Keycloak services Versions

1 component(s)
Fixed Versions:
21.1.2
Product / Package Ecosystem Affected Versions Fixed Version
org.keycloak:keycloak-services
maven/org.keycloak/keycloak-services
Maven
< 21.1.2
21.1.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/keycloak/keycloak/security/advisories/GHSA-3p62-6fjh-3p5h
NVD — CVE-2022-4361 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-4361
Security Fix Commit FIX COMMIT
https://github.com/keycloak/keycloak/commit/a1cfe6e24e5b34792699a00b8b4a8016a5929e3a
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2151618
Keycloak services Source Repository REPOSITORY
https://github.com/keycloak/keycloak

Frequently Asked Questions

What is CVE-2022-4361?
CVE-2022-4361 is a security vulnerability in Keycloak services involving Keycloak vulnerable to cross-site scripting when validating URI-schemes on SAML and OIDC under CWE-81: Improper Neutralization of Script in an Error Message Web Page.
Which Keycloak services versions are affected?
Affected versions include releases prior to 21.1.2 across affected packages: org.keycloak:keycloak-services.
What version fixes CVE-2022-4361?
Upgrading to 21.1.2 (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 21.1.2. Upgrade your dependency to 21.1.2 or later.
What is the CVSS score of CVE-2022-4361?
CVE-2022-4361 has a CVSS v3.1 base score of 10.0 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
What CWE is associated with CVE-2022-4361?
CVE-2022-4361 is classified under CWE-81: Improper Neutralization of Script in an Error Message Web Page (The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters that could be interpreted as web-scripting elements when they are sent to an error page.).
How can I check Maven dependencies for CVE-2022-4361?
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-3p62-6fjh-3p5h",
  "modified" : "2023-07-07T21:47:57Z",
  "published" : "2023-06-30T20:30:50Z",
  "aliases" : [ "CVE-2022-4361" ],
  "summary" : "Keycloak vulnerable to cross-site scripting when validating URI-schemes on SAML and OIDC",
  "details" : "AssertionConsumerServiceURL is a Java implementation for SAML Service Providers (org.keycloak.protocol.saml). Affected versions of this package are vulnerable to Cross-site Scripting (XSS).\n\nAssertionConsumerServiceURL allows XSS when sending a crafted SAML XML request.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-services"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "21.1.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak/security/advisories/GHSA-3p62-6fjh-3p5h"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-4361"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak/commit/a1cfe6e24e5b34792699a00b8b4a8016a5929e3a"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2151618"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/keycloak/keycloak"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79", "CWE-81" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-06-30T20:30:50Z",
    "nvd_published_at" : "2023-07-07T20:15:09Z"
  }
}