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CVE-2020-1025

CRITICAL
9.8
CVSS Severity Score
EPSS Score0.1880%
EPSS Percentile18.82th
PublishedJul 14, 2020
Last ModifiedFeb 23, 2026

Vulnerability Description

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.

Affected Platforms (CPE)

πŸ“¦
Microsoft

Lync

= 2013
πŸ“¦
Microsoft

Sharepoint Enterprise Server

= 2016
πŸ“¦
Microsoft

Sharepoint Foundation

= 2013
πŸ“¦
Microsoft

Sharepoint Server

= 2019
πŸ“¦
Microsoft

Skype For Business

= 2015
πŸ“¦
Microsoft

Skype For Business

= 2019

References & Advisories

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