Microsoft SharePoint Server Remote Code Execution Vulnerability

How could an attacker exploit the vulnerability? An authenticated attacker with Site Owner permissions or higher could upload a specially crafted file to the targeted SharePoint Server and craft specialized API requests to trigger deserialization of file's parameters. This would enable the attacker to perform remote code execution in the context of the SharePoint Server.

According to the CVSS metric, privileges required is high (PR:H). What does that mean for this vulnerability? An authenticated attacker with Site Owner permissions can use the vulnerability to inject arbitrary code and execute this code in the context of SharePoint Server.