Vulnerability Intelligence Report
Microsoft Office Elevation of Privilege Vulnerability
CVE-2020-1025
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.
No Active Exploit Signals
CVSS Base Score
9.8
CRITICAL
EPSS Probability:5.85%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | Skype for Business Server 2019 CU2 | 7.0.0 < publication (affected) |
| Microsoft | Skype for Business Server 2015 CU 8 | 2015 CU 8 < publication (affected) |
| Microsoft | Microsoft Lync Server 2013 | 0 < publication (affected) |
| Microsoft | Microsoft SharePoint Enterprise Server 2016 | 16.0.0 < publication (affected) |
| Microsoft | Microsoft SharePoint Server 2019 | 16.0.0 < publication (affected) |
| Microsoft | Microsoft SharePoint Foundation 2013 Service Pack 1 | 15.0.0 < publication (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
5.853%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2019-11-04T00:00:00 |
| Published | 2020-07-14T22:53:56 |
| Patch Date | 2020-07-14 |
| Last Updated | 2024-08-04T06:24:59 |
Community Chatter & Buzz