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.
Published: 2020-07-14
Score: 9.8 Critical
EPSS: 13.8% Moderate
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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History

Mon, 23 Feb 2026 18:15:00 +0000

Type Values Removed Values Added
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. 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.

Subscriptions

Microsoft Lync Lync Server Sharepoint Enterprise Server Sharepoint Foundation Sharepoint Server Skype For Business Skype For Business Server
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2024-08-04T06:24:59.514Z

Reserved: 2019-11-04T00:00:00.000Z

Link: CVE-2020-1025

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2020-07-14T23:15:11.447

Modified: 2026-02-23T18:23:01.917

Link: CVE-2020-1025

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses