CVE-2023-6787: Keycloak vulnerable to session hijacking via re-authentication

April 17, 2024

A flaw was found in Keycloak. An active keycloak session can be hijacked by initiating a new authentication (having the query parameter prompt=login) and forcing the user to enter his credentials once again. If the user cancels this re-authentication by clicking Restart login, the account takeover could take place as the new session, with a different SUB, will have the same SID as the previous session.

References

github.com/advisories/GHSA-c9h6-v78w-52wj
github.com/keycloak/keycloak
github.com/keycloak/keycloak/security/advisories/GHSA-c9h6-v78w-52wj
nvd.nist.gov/vuln/detail/CVE-2023-6787

Detect and mitigate CVE-2023-6787 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →