Provide references for CVE-2021-44520.
Where can I find more information about CVE-2021-44520?
References are available at: https://docs.citrix.com/en-us/xenmobile/server/document-history.html, https://gist.github.com/tree-chtsec/766f81e22ae383987d75eedb3b23b709, https://support.citrix.com/article/CTX370551, https://www.chtsecurity.com/news/09be10ae-b50e-46c9-8ce7-2e995fd988fe.