Description of the security update for SharePoint Server 2019 Language Pack: April 14, 2020

Summary

This security update resolves a cross-site-scripting (XSS) vulnerability that exists if Microsoft SharePoint Server does not correctly sanitize a specially crafted web request to an affected SharePoint server. This update also resolves a remote code execution vulnerability that exists in Microsoft SharePoint if the software does not check the source markup of an application package. To learn more about the vulnerabilities, see the following security advisories:

• Microsoft Common Vulnerabilities and Exposures CVE-2020-0923
• Microsoft Common Vulnerabilities and Exposures CVE-2020-0931
• Microsoft Common Vulnerabilities and Exposures CVE-2020-0980
  Note To apply this security update, you must have the release version of Microsoft SharePoint Server 2019 installed on the computer.

How to get and install the update

Method 1: Microsoft Update

This update is available from Microsoft Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to get security updates automatically, see Windows Update: FAQ.

Method 2: Microsoft Update Catalog

To get the standalone package for this update, go to the Microsoft Update Catalog website.

Method 3: Microsoft Download Center

You can get the standalone update package through the Microsoft Download Center. Follow the installation instructions on the download page to install the update.

• Download security update 4484291 for the 64-bit version of SharePoint Server 2019 Language Pack

More information

Security update deployment information

For deployment information about this update, see security update deployment information: April 14, 2020.

Security update replacement information

This security update replaces previously released update 4484271.

File hash information

File name	SHA1 hash	SHA256 hash
wssloc2019-kb4484291-fullfile-x64-glb.exe	9311B5111555E9FDE9082BA3F3B5159C78225FF2	FC896BAD4AD80EB82EBB16E1EA16DC5E1CA27DD7080456BE90718B3B9FEB9408

File informationDownload the list of files that are included in security update 4484291.

Information about protection and security

Protect yourself online: Windows Security supportLearn how we guard against cyber threats: Microsoft Security