Microsoft SharePoint Server Remote Code Execution Vulnerability

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

How could an attacker exploit the vulnerability? In a network-based attack, an authenticated attacker, as at least a Site Owner, could write arbitrary code to inject and execute code remotely on the SharePoint Server.