CVE-2020-1025

CRITICAL

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published7/14/2020

Last Modified2/23/2026

Sourcenvd

Honeypot Sightings0

Affected Products

microsoft:lyncmicrosoft:sharepoint_enterprise_servermicrosoft:sharepoint_foundationmicrosoft:sharepoint_servermicrosoft:skype_for_business

Weaknesses (CWE)

CWE-20

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1025(secure@microsoft.com)

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1025(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.