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GSA_kwCzR0hTQS1tOThnLTYzcWotZnA4as1BkA

Moderate

Reflected XSS on clients-registrations endpoint

Affected Packages Affected Versions Fixed Versions
maven:org.keycloak:keycloak-parent >= 10.0.0, < 18.0.0 18.0.0
9 Dependent packages
41 Dependent repositories

Affected Version Ranges

All affected versions

10.0.0, 10.0.1, 10.0.2, 11.0.0, 11.0.1, 11.0.2, 11.0.3, 12.0.0, 12.0.1, 12.0.2, 12.0.3, 12.0.4, 13.0.0, 13.0.1, 14.0.0, 15.0.0, 15.0.1, 15.0.2, 15.1.0, 15.1.1, 16.0.0, 16.1.0, 16.1.1, 17.0.0, 17.0.1

All unaffected versions

5.0.0, 6.0.0, 6.0.1, 7.0.0, 7.0.1, 8.0.0, 8.0.1, 8.0.2, 9.0.0, 9.0.2, 9.0.3, 18.0.0, 18.0.1, 18.0.2, 19.0.0, 19.0.1, 19.0.2, 19.0.3, 20.0.0, 20.0.1, 20.0.2, 20.0.3, 20.0.4, 20.0.5, 21.0.0, 21.0.1, 21.0.2, 21.1.0, 21.1.1, 21.1.2, 22.0.0, 22.0.1, 22.0.2, 22.0.3, 22.0.4, 22.0.5, 23.0.0, 23.0.1, 23.0.2, 23.0.3, 23.0.4, 23.0.5, 23.0.6, 23.0.7, 24.0.0, 24.0.1, 24.0.2, 24.0.3, 24.0.4, 24.0.5, 25.0.0, 25.0.1, 25.0.2, 25.0.3, 25.0.4, 25.0.5, 25.0.6, 26.0.0, 26.0.1, 26.0.2, 26.0.3, 26.0.4, 26.0.5, 26.0.6, 26.0.7, 26.0.8, 26.1.0, 26.1.1, 26.1.2, 26.1.3, 26.1.4, 26.1.5, 26.2.0, 26.2.1, 26.2.2, 26.2.3, 26.2.4, 26.2.5, 26.3.0, 26.3.1, 26.3.2

A POST based reflected Cross Site Scripting vulnerability on has been identified in Keycloak. When a malicious request is sent to the client registration endpoint, the error message is not properly escaped, allowing an attacker to execute malicious scripts into the user's browser.

Acknowledgement

Keycloak would like to thank Quentin TEXIER (Pentester at Opencyber) for reporting this issue.

References: