Provide references for CVE-2021-38555.
Where can I find more information about CVE-2021-38555?
References are available at: https://lists.apache.org/thread.html/r589d1a9f94dbeee7a0f5dbe8513a0e300dfe669bd964ba2fbfe28e07%40%3Cannounce.apache.org%3E.