CVE-2020-1024: Microsoft SharePoint Enterprise Server

High severity, CVSS 8.8. EPSS: 3.7% chance of exploitation in the next 30 days.

A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the SharePoint application pool and the SharePoint server farm account. Exploitation of this vulnerability requires that a user uploads a specially crafted SharePoint application package to an affected version of SharePoint. The security update addresses the vulnerability by correcting how SharePoint checks the source markup of application packages.

Affected products

• Microsoft SharePoint Enterprise Server: version 2016 only
• Microsoft SharePoint Foundation: version 2013 only
• Microsoft SharePoint Server: version 2019 only

Published 2020-05-21. Last modified 2026-08-19.