CVE-2022-4361 Keycloak vulnerable to cross-site scripting when validating URI-schemes on SAML and OIDC

What is CVE-2022-4361?

CVE-2022-4361 is a critical cross-site scripting vulnerability in Redhat Keycloak, published on 7 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the SAML or OIDC providers. The vulnerability can allow an attacker to execute malicious scripts by setting the AssertionConsumerServiceURL value or the redirect_uri.

Weakness: CWE-79, CWE-81

Which versions are affected by CVE-2022-4361?

2 open source packages ship an affected version, including org.keycloak:keycloak-services. It affects 5 products.

Products include Redhat Keycloak, Redhat Openshift Container Platform, Redhat Openshift Container Platform for Ibm Linuxone, Redhat Openshift Container Platform for Power, Redhat Single Sign-On.

How do I fix CVE-2022-4361?

Upgrade org.keycloak:keycloak-services to 21.1.2 or later.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2022-4361 being exploited?

There is no known exploitation of CVE-2022-4361 in the wild and no public exploit code.

Public exploit code: 2 proofs of concept on GitHub.

Other vulnerabilities in Redhat Keycloak

• CVE-2022-1245 Keycloak vulnerable to privilege escalation on Token Exchange feature Critical 9.8
• CVE-2021-20195 keycloak Self Stored Cross-site Scripting vulnerability Critical 9.6
• CVE-2019-14910 Keycloak Authentication Error Critical 9.3
• CVE-2019-14909 Keycloak Authentication Error Critical 9.3
• CVE-2022-3782 Keycloak vulnerable to path traversal via double URL encoding Critical 9.1

All Redhat Keycloak vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-3p62-6fjh-3p5h.