CVE-2020-0927 Cross-site scripting in Microsoft SharePoint Enterprise Server

Medium 5.4 Published 15 Apr 2020 Updated 28 Feb 2025

An attacker can execute arbitrary scripts in a victim's browser via a crafted request to Microsoft SharePoint Server.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2020-0927?

CVE-2020-0927 is a medium-severity cross-site scripting vulnerability in Microsoft Sharepoint Enterprise Server, published on 15 Apr 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

A cross-site-scripting (XSS) vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted web request to an affected SharePoint server, aka 'Microsoft Office SharePoint XSS Vulnerability'. This CVE ID is unique from CVE-2020-0923, CVE-2020-0924, CVE-2020-0925, CVE-2020-0926, CVE-2020-0930, CVE-2020-0933, CVE-2020-0954, CVE-2020-0973, CVE-2020-0978.

Weakness: CWE-79

Which versions are affected by CVE-2020-0927?

It affects 2 products.

Products include Microsoft Sharepoint Enterprise Server, Microsoft Sharepoint Server.

How do I fix CVE-2020-0927?

No fix has been published for CVE-2020-0927 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2020-0927 being exploited?

There is no known exploitation of CVE-2020-0927 in the wild and no public exploit code.

All Microsoft Sharepoint Enterprise Server vulnerabilities

Sources

Also known as GHSA-m79w-3hmw-xxc7.