CVE-2021-31207 | Microsoft Exchange Server 2013 CU23/2016 CU19/2016 CU20/2019 CU8/2019 CU9 ProxyShell unrestricted upload
A vulnerability classified as critical has been found in Microsoft Exchange Server 2013 CU23/2016 CU19/2016 CU20/2019 CU8/2019 CU9. Affected is an unknown function. The manipulation leads to unrestricted upload.
This vulnerability is traded as CVE-2021-31207. It is possible to launch the attack remotely. Furthermore, there is an exploit available.
It is recommended to apply a patch to fix this issue.