CVEvulnerability

CVE-2020-1025

9.8 CRITICAL Published 2020-07-14 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2020-07-14
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
7.5 HIGH — AV:N/AC:L/Au:N/C:P/I:P/A:P
Weaknesses
CWE-20

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 configurations

• microsoft lync 2013 • microsoft sharepoint enterprise server 2016 • microsoft sharepoint foundation 2013 • microsoft sharepoint server 2019 • microsoft skype for business 2015 • microsoft skype for business 2019

Related

Weakness · CWE (1)

  • CWE-20 Improper Input Validation weakness

References