Provide references for CVE-2021-21318.
Where can I find more information about CVE-2021-21318?
References are available at: https://github.com/opencast/opencast/security/advisories/GHSA-vpc2-3wcv-qj4w, https://github.com/opencast/opencast/commit/b18c6a7f81f08ed14884592a6c14c9ab611ad450.