CVE-2026-20959
Unknown
Unknown - Not Provided
Cross-Site Scripting in Microsoft SharePoint Enables Network Spoofing
Publication date: 2026-01-13
Last updated on: 2026-01-13
Assigner: Microsoft Corporation
Description
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.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | office_sharepoint | * |
Helpful Resources
Exploitability
CWE
KEV
| 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
Can you explain this vulnerability to me?
This vulnerability is a cross-site scripting (XSS) issue in Microsoft Office SharePoint where improper neutralization of input during web page generation allows an authorized attacker to perform spoofing over a network. [1]
How can this vulnerability impact me? :
An attacker who is authorized can exploit this vulnerability to perform spoofing attacks over a network, potentially misleading users or systems by presenting false information. [1]
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