CVE-2026-20945
Cross-Site Scripting in Microsoft SharePoint Enables Network Spoofing
Publication date: 2026-04-14
Last updated on: 2026-05-06
Assigner: Microsoft Corporation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| 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 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. |
Attack-Flow Graph
AI Powered Q&A
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The provided information does not specify how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.