CVE-2020-1102 Microsoft SharePoint Remote Code Execution Vulnerability

High 8.8 Published 21 May 2020 Updated 19 Aug 2026

An attacker can execute arbitrary code by uploading a malicious SharePoint application package, requiring user interaction to upload the file.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-1102?

CVE-2020-1102 is a high-severity vulnerability in Microsoft Sharepoint Enterprise Server, published on 21 May 2020. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

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.

Weakness: CWE-434

Which versions are affected by CVE-2020-1102?

It affects 2 products.

Products include Microsoft Sharepoint Enterprise Server, Microsoft Sharepoint Server.

How do I fix CVE-2020-1102?

No fix has been published for CVE-2020-1102 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-1102 being exploited?

There is no known exploitation of CVE-2020-1102 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

All Microsoft Sharepoint Enterprise Server vulnerabilities

Sources

Also known as GHSA-xq28-w75v-29rr.