CVE-2020-1025
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Microsoft Sharepoint Enterprise Server
PublishedJul 14, 2020
First seenJul 14, 2020
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft sharepoint_enterprise_server | 2016 | — |
| microsoft lync | 2013 | — |
| microsoft sharepoint_foundation | 2013 | — |
| microsoft sharepoint_server | 2019 | — |
| microsoft skype_for_business | 2015, 2019 | — |
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