Below are the security fixes for the SharePoint OnPrem versions released this month.
SharePoint 2013:
SharePoint 2013 has reached end of support. No further security fixes will be released for this product. Please update to a supported SharePoint version to ensure that your environment stays secure.
SharePoint Server 2016:
- KB 5002397 – SharePoint Server 2016 (language independent)
Microsoft Support recommends to install the complete May 2023 CU for SharePoint 2016 rather than individual security fixes.
SharePoint Server 2019:
- KB 5002389 – SharePoint Server 2019 (language independent)
Microsoft Support recommends to install the complete May 2023 CU for SharePoint 2019 rather than individual security fixes.
SharePoint Server Subscription Edition:
- KB 5002390 – SharePoint Server Subscription Edition
This security fix includes the complete May 2023 CU for SharePoint Server Subscription Edition.
Office Online Server:
- KB 5002372 – Office Online Server
More information: