Microsoft SharePoint Server Spoofing Vulnerability

There are multiple update packages available for some of the affected software. Do I need to install all the updates listed in the Security Updates table for the software?
Yes. Customers should apply all updates offered for the software installed on their systems. If multiple updates apply, they can be installed in any order.

How could an attacker exploit the vulnerability?
An attacker who successfully exploited this vulnerability might be able to run their scripts in the security context of the current user by enticing the user to click on a link resulting in a cross-site scripting attack on the SharePoint Server.

According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability?
The attacker must be authenticated and possess the permissions for page creation to be able to exploit this vulnerability.

According to the CVSS metric, successful exploitation of this vulnerability could lead to total loss of confidentiality (C:H), integrity (I:H), and availability (A:H). What does that mean for this vulnerability?
An attacker who successfully exploits this vulnerability could perform a remote attack that could enable access to the victim's information and the ability to alter information. Successful exploitation could also potentially cause downtime for the targeted environment.

Security updates
16.0.10401.20025 — https://support.microsoft.com/help/5002436
16.0.10401.20025 — https://support.microsoft.com/help/5002422
16.0.16130.20684 — https://support.microsoft.com/help/5002437