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TI-2021-03518 Aliases CVE-2021-20222GHSA-2mq8-99q7-55wx

Improper input validation in keycloak

Priority LOW 35CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

A flaw was found in keycloak. The new account console in keycloak can allow malicious code to be executed using the referrer URL. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Why it matters now

EPSS 0.0119 68th percentileScored 2026-11-07
Fix Fixed org.keycloak:keycloak-parent (Maven): 12.0.3

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—keycloakkeycloak 13.0.0—No fix listedCNA
—org.keycloak:keycloak-parent (Maven)9.0.0 to before 12.0.312.0.3Patch availableGHSA-2mq8-99q7-55wx
  • keycloak Vendor— Affected keycloak 13.0.0 Fixed in — No fix listed CNA
  • org.keycloak:keycloak-parent (Maven) Vendor— Affected 9.0.0 to before 12.0.3 Fixed in 12.0.3 Patch available GHSA-2mq8-99q7-55wx

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:*9.0.0 to before 13.0.0VulnerableRed Hat
  • cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:* Versions 9.0.0 to before 13.0.0 Vulnerable ·Red Hat

Remediation

  • Fix · GHSA-2mq8-99q7-55wx org.keycloak:keycloak-parent (Maven) Fixed in 12.0.3 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 7 products
  • Red Hat Decision Manager 7
  • Red Hat Fuse 7
  • Red Hat Integration Camel K 1
  • Red Hat OpenShift Application Runtimes
  • Red Hat Process Automation 7
  • Red Hat Single Sign-On 7
  • Red Hat support for Spring Boot

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-20222
  2. 2026-10-03 Alias added: GHSA-2mq8-99q7-55wx

References

Advisory 2

Other 2

  • TI-2024-01049 Keycloak: path transversal in redirection validation CVSS 3.1HIGH 8.1
  • TI-2023-26623 The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6… CVSS 3.1MEDIUM 5.9
  • TI-2020-08665 Server-side request forgery in keycloak CVSS 3.1MEDIUM 5.3
  • TI-2022-03468 Path traversal in Red Hat Keycloak CVSS 3.1CRITICAL 9.1
  • TI-2021-03612 A POST based reflected Cross Site Scripting vulnerability on has been identified in Keycloak. CVSS 3.1MEDIUM 6.1
  • TI-2022-03994 Cross-site scripting in keycloak CVSS 3.1CRITICAL 10.0
See all 97 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences