CVE-2021-1726: Microsoft SharePoint Server Spoofing Vulnerability

Overview

Severity

High (CVSS 8)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Category

Spoofing

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2021-Feb

Released

2021-02-09

EPSS Score

6.52% (percentile: 91.1%)

FAQ

What is the nature of the spoofing? An authenticated attacker could manipulate a SharePoint blog sharing functionality to trigger messaging or a link that appears to be from the SharePoint target site.

Affected Products (4)

Microsoft Office

• Microsoft SharePoint Enterprise Server 2016
• Microsoft SharePoint Server 2019
• Microsoft SharePoint Foundation 2010 Service Pack 2
• Microsoft SharePoint Foundation 2013 Service Pack 1

Security Updates (4)

• 4493195
• 4493194
• 4493223
• 4493210

Acknowledgments

Huynh Phuoc Hung, <a href="https://twitter.com/hph0var">@hph0var</a>

Revision History

• 2021-02-09: Information published.