CVE-2021-31181: Microsoft SharePoint WebPart Interpretation Conflict Remote Code Execution Vulnerability
First published: Tue May 11 2021(Updated: )
Microsoft SharePoint Remote Code Execution Vulnerability
Credit: secure@microsoft.com secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft SharePoint Enterprise Server | =2016 | |
| Microsoft SharePoint Foundation | =2013-sp1 | |
| Microsoft SharePoint Server | =2019 | |
| Microsoft SharePoint | ||
| Microsoft SharePoint Foundation 2013 | ||
| Microsoft SharePoint Enterprise Server 2016 | ||
| Microsoft SharePoint Server 2019 |
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Reference Links
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31181 (Advisory)
- http://packetstormsecurity.com/files/163208/Microsoft-SharePoint-Unsafe-Control-And-ViewState-Remote-Code-Execution.html
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31181
- https://www.zerodayinitiative.com/advisories/ZDI-21-573/
Frequently Asked Questions
What is CVE-2021-31181?
CVE-2021-31181 is a vulnerability in Microsoft SharePoint that allows remote attackers to execute arbitrary code.
How severe is the CVE-2021-31181 vulnerability?
The severity of CVE-2021-31181 is rated as high, with a severity value of 8.8.
How can I exploit CVE-2021-31181?
To exploit CVE-2021-31181, remote attackers would need to authenticate and then use a specific flaw in the handling of server-side controls in WebParts.
Which versions of Microsoft SharePoint are affected by CVE-2021-31181?
The following versions of Microsoft SharePoint are affected: SharePoint Foundation 2013 SP1, SharePoint Enterprise Server 2016, and SharePoint Server 2019.
How can I fix CVE-2021-31181?
To fix CVE-2021-31181, apply the relevant patches provided by Microsoft for SharePoint Foundation 2013, SharePoint Enterprise Server 2016, and SharePoint Server 2019.
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