CVE-2026-20945
Received Received - Intake
Cross-Site Scripting in Microsoft SharePoint Enables Network Spoofing

Publication date: 2026-04-14

Last updated on: 2026-05-06

Assigner: Microsoft Corporation

Description
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
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Meta Information
Published
2026-04-14
Last Modified
2026-05-06
Generated
2026-06-16
AI Q&A
2026-04-14
EPSS Evaluated
2026-06-15
NVD
CVE-2026-20945
EUVD
EUVD-2026-22355
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
microsoft sharepoint_server 2019
microsoft sharepoint_server 2016
microsoft sharepoint_server to 16.0.19725.20210 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

This vulnerability is an improper neutralization of input during web page generation, commonly known as cross-site scripting (XSS), in Microsoft Office SharePoint.

It allows an authorized attacker to perform spoofing over a network by injecting malicious scripts into web pages.

Impact Analysis

The vulnerability can impact you by enabling an authorized attacker to perform spoofing attacks over a network.

This means the attacker could impersonate legitimate users or services, potentially leading to unauthorized actions or misleading information being presented.

Compliance Impact

The provided information does not specify how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

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