Provide references for CVE-2021-28807.
Where can I find more information about CVE-2021-28807?
References are available at: https://www.qnap.com/zh-tw/security-advisory/qsa-21-20, https://www.shielder.it/advisories/qnap-qcenter-virtual-stored-xss/, https://www.shielder.it/advisories/qnap-qcenter-post-auth-remote-code-execution-via-qpkg/.