CVE-2018-14655 Keycloak vulnerable to cross-site scripting via the state parameter

What is CVE-2018-14655?

CVE-2018-14655 is a medium-severity cross-site scripting vulnerability in Redhat Keycloak, published on 13 Nov 2018. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

A flaw was found in Keycloak 3.4.3.Final, 4.0.0.Beta2, 4.3.0.Final. When using 'response_mode=form_post' it is possible to inject arbitrary Javascript-Code via the 'state'-parameter in the authentication URL. This allows an XSS-Attack upon succesfully login.

Weakness: CWE-79

Which versions are affected by CVE-2018-14655?

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

Products include Redhat Keycloak, Redhat Single Sign-On.

How do I fix CVE-2018-14655?

Upgrade to a fixed version.

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-2018-14655 being exploited?

There is no known exploitation of CVE-2018-14655 in the wild and no public exploit code.

Other vulnerabilities in Redhat Keycloak

• CVE-2022-4361 Keycloak vulnerable to cross-site scripting when validating URI-schemes on SAML and OIDC Critical 10.0
• 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

All Redhat Keycloak vulnerabilities

Sources

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

Also known as GHSA-458h-wv48-fq75.