Microsoft SharePoint Server-Side Control Improper Input Validation Remote Code Execution Vulnerability [CVE-2021-42309]
CVE number = CVE-2021-42309
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. An unsafe server-side control can be instantiated if it is specified as a child of a permitted control. An attacker can leverage this vulnerability to execute code in the context of the service account.
Microsoft has issued an update to correct this vulnerability.
More details can be found at:
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42309
Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.