Below are the security fixes for the SharePoint OnPrem versions released this month.
SharePoint Server 2016:
- KB 5002425 – SharePoint Server 2016 (language independent)
Microsoft Support recommends to install the complete July 2023 CU for SharePoint 2016 rather than individual security fixes.
SharePoint Server 2019:
- KB 5002423 – SharePoint Server 2019 (language independent)
Microsoft Support recommends to install the complete July 2023 CU for SharePoint 2019 rather than individual security fixes.
SharePoint Server Subscription Edition:
- KB 5002424 – SharePoint Server Subscription Edition
This security fix includes the complete July 2023 CU for SharePoint Server Subscription Edition.
Office Online Server:
- KB 5002421 – Office Online Server
See the Security Update Guide below for more details about the relevant fixes:
More information:
More information:
Please ensure to have a look at the SharePoint Patching Best Practices before applying new fixes.
Security Vulnerabilities fixed in this PU
| Vulnerability | SP 2016 | SP 2019 | SP SE | OOS | Impact | Max Severity |
|---|---|---|---|---|---|---|
| CVE-2023-33134 | x | x | x | Remote Code Execution | Important | |
| CVE-2023-33157 | x | x | x | Remote Code Execution | Critical | |
| CVE-2023-33159 | x | x | x | Spoofing | Important | |
| CVE-2023-33160 | x | x | x | Remote Code Execution | Critical | |
| CVE-2023-33162 | x | Information Disclosure | Important | |||
| CVE-2023-33165 | x | x | Security Feature Bypass | Important |
See the Security Update Guide below for more details about the relevant fixes: