CVE-2021-31172
vulnerability analysis and mitigation

Overview

Microsoft SharePoint Server Spoofing Vulnerability (CVE-2021-31172) was disclosed on May 11, 2021. This vulnerability affects multiple versions of SharePoint, including SharePoint Foundation 2013 SP1, SharePoint Server 2016 Enterprise, and SharePoint Server 2019 (NVD Database).

Technical details

The vulnerability has been assigned a CVSS v3.1 base score of 7.1 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N. The vulnerability is classified as CWE-290 (Authentication Bypass by Spoofing) (NVD Database).

Impact

If successfully exploited, this vulnerability could allow an attacker to perform spoofing attacks, potentially leading to high confidentiality impact and low integrity impact. The vulnerability requires user interaction but does not require privileges for exploitation (NVD Database).

Mitigation and workarounds

Microsoft has released security updates to address this vulnerability. The fixes are included in the May 11, 2021 security updates for affected SharePoint versions. Organizations should apply KB5001917 for SharePoint Enterprise Server 2016 and KB5001916 for SharePoint Server 2019 (Microsoft Support).

Additional resources


SourceThis report was generated using AI

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