CVE-2021-31181: Microsoft SharePoint WebPart Interpretation Conflict Remote Code Execution Vulnerability
Microsoft SharePoint Remote Code Execution Vulnerability
Other sources
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft SharePoint. Authentication is required to exploit this vulnerability. The specific flaw exists within the handling of server-side controls in WebParts. By specifying a control using a non-canonical string, an unsafe server-side control can be instantiated. An attacker can leverage this vulnerability to execute code in the context of the service account.
Affected Software
Remediation
Event History
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.