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CVE-2023-23395: Microsoft SharePoint Server Spoofing Vulnerability

• Severity: low (CVSS 3.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-03-14 · updated 2026-06-17
• Weakness: CWE-601

Description

Microsoft SharePoint Server Spoofing Vulnerability

Affected products

• Microsoft SharePoint Foundation 2013 Service Pack 1: 2013-sp1
• Microsoft SharePoint Server: 2013-sp1, 2019
• Microsoft SharePoint Enterprise Server 2013 Service Pack 1: from 15.0.0 before 15.0.5537.1000 — fixed in 15.0.5537.1000
• Microsoft SharePoint Server Subscription Edition: from 16.0.0 before 16.0.16130.20166 — fixed in 16.0.16130.20166
• Microsoft Sharepoint Enterprise Server 2016: from 16.0.0 before 16.0.5387.1000 — fixed in 16.0.5387.1000
• Microsoft SharePoint Foundation 2013 Service Pack 1: from 15.0.0 before 15.0.5537.1000 — fixed in 15.0.5537.1000
• Microsoft SharePoint Server: from 16.0.0 before 16.0.10396.20000 — fixed in 16.0.10396.20000

How to fix

Upgrade to a fixed version: Microsoft SharePoint Enterprise Server 2013 Service Pack 1 15.0.5537.1000; Microsoft SharePoint Server Subscription Edition 16.0.16130.20166; Microsoft Sharepoint Enterprise Server 2016 16.0.5387.1000; Microsoft SharePoint Foundation 2013 Service Pack 1 15.0.5537.1000; Microsoft SharePoint Server 16.0.10396.20000. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-23395
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-23395

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