Microsoft SharePoint is vulnerable to a remote code execution when the software fails to check the source markup of an application package.
View the template here CVE-2020-16952.yaml
References:
https://github.com/rapid7/metasploit-framework/blob/1a341ae93191ac5f6d8a9603aebb6b3a1f65f107/documentation/modules/exploit/windows/http/sharepoint_ssi_viewstate.md