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CVE Number Vulnerability Product Severity Date
CVE-2020-1025 Microsoft Office Elevation of Privilege Vulnerability Microsoft SharePoint Server Critical 15-07-2020

Technical Information

Brief overview of the risk:

An elevation of privilege vulnerability exists when Microsoft SharePoint Server and Skype for Business Server improperly handle OAuth token validation. An attacker who successfully exploited the vulnerability could bypass authentication and achieve improper access.
To exploit this vulnerability, an attacker would need to modify the token.
The update addresses the vulnerability by modifying how Microsoft SharePoint Server and Skype for Business Server validate tokens.

Further information on this vulnerability is available at : CVE-2020-1025

Affected Software

Skype for Business Server 2019 CU2
Skype for Business Server 2015 CU 8
Microsoft Lync Server 2013
Microsoft SharePoint Enterprise Server 2016
Microsoft SharePoint Server 2019
Microsoft SharePoint Foundation 2013 Service Pack 1