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TI-2020-12934 Aliases CVE-2020-16946GHSA-5hw6-9rj2-gh22

Microsoft Office SharePoint XSS Vulnerability

Priority MEDIUM 41CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

<p>A cross-site-scripting (XSS) vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted web request to an affected SharePoint server. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected SharePoint server.</p> <p>The attacker who successfully exploited the vulnerability could then perform cross-site scripting attacks on affected systems and run script in the security context of the current user. The attacks could allow the attacker to read content that the attacker is not authorized to read, use the victim's identity to take actions on the SharePoint site on behalf of the user, such as change permissions and delete content, and inject malicious content in the browser of the user.</p> <p>The security update addresses the vulnerability by helping to ensure that SharePoint Server properly sanitizes web requests.</p>

Why it matters now

EPSS 0.01612 76th percentileScored 2026-11-07
Fix Fixed Microsoft SharePoint Enterprise Server 2016 (Microsoft): publicationMicrosoft SharePoint Server 2019 (Microsoft): publication+2 more products

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft SharePoint Enterprise Server 201616.0.0 to before publicationpublicationPatch availableCNA
MicrosoftMicrosoft SharePoint Server 201916.0.0 to before publicationpublicationPatch availableCNA
MicrosoftMicrosoft SharePoint Foundation 2010 Service Pack 213.0.0 to before publicationpublicationPatch availableCNA
MicrosoftMicrosoft SharePoint Foundation 2013 Service Pack 115.0.0 to before publicationpublicationPatch availableCNA
  • Microsoft SharePoint Enterprise Server 2016 VendorMicrosoft Affected 16.0.0 to before publication Fixed in publication Patch available CNA
  • Microsoft SharePoint Server 2019 VendorMicrosoft Affected 16.0.0 to before publication Fixed in publication Patch available CNA
  • Microsoft SharePoint Foundation 2010 Service Pack 2 VendorMicrosoft Affected 13.0.0 to before publication Fixed in publication Patch available CNA
  • Microsoft SharePoint Foundation 2013 Service Pack 1 VendorMicrosoft Affected 15.0.0 to before publication Fixed in publication Patch available CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:sharepoint_designer:2013:sp1:*:*:*:*:*:*2013 sp1VulnerableMicrosoft
cpe:2.3:a:microsoft:sharepoint_enterprise_server:2016:*:*:*:*:*:*:*2016VulnerableMicrosoft
cpe:2.3:a:microsoft:sharepoint_foundation:2010:sp2:*:*:*:*:*:*2010 sp2VulnerableMicrosoft
cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*2019VulnerableMicrosoft
  • cpe:2.3:a:microsoft:sharepoint_designer:2013:sp1:*:*:*:*:*:* Versions 2013 sp1 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:sharepoint_enterprise_server:2016:*:*:*:*:*:*:* Versions 2016 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:sharepoint_foundation:2010:sp2:*:*:*:*:*:* Versions 2010 sp2 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:* Versions 2019 Vulnerable ·Microsoft

Remediation

  • Fix · CNA Microsoft SharePoint Enterprise Server 2016 (Microsoft) Fixed in publication
  • Fix · CNA Microsoft SharePoint Server 2019 (Microsoft) Fixed in publication
  • Fix · CNA Microsoft SharePoint Foundation 2010 Service Pack 2 (Microsoft) Fixed in publication
  • Fix · CNA Microsoft SharePoint Foundation 2013 Service Pack 1 (Microsoft) Fixed in publication

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-16946
  2. 2026-10-03 Alias added: GHSA-5hw6-9rj2-gh22

References

Patch 1

  • TI-2015-02093 Microsoft Excel 2007 SP3, Excel 2010 SP2, Excel 2013 SP1, Excel 2013 RT SP1, Office for… CVSS 2.0HIGH 9.3
  • TI-2014-00243 Microsoft Windows SharePoint Services 3.0 SP3; SharePoint Server 2007 SP3, 2010 SP1 and… CVSS 2.0HIGH 9.0
  • TI-2016-02832 Microsoft Excel 2007 SP3, Excel 2010 SP2, Excel 2013 SP1, Excel 2013 RT SP1, Excel 2016… CVSS 3.0HIGH 7.8
  • TI-2016-00114 Microsoft Excel 2007 SP3, Excel 2010 SP2, Office Compatibility Pack SP3, Excel Services… CVSS 3.0HIGH 7.8
  • TI-2016-02825 Microsoft Excel 2007 SP3, Excel 2010 SP2, Excel 2013 SP1, Excel 2013 RT SP1, Excel 2016… CVSS 3.0HIGH 7.8
  • TI-2016-02829 Microsoft Excel 2007 SP3, Excel 2010 SP2, Excel 2013 SP1, Excel 2013 RT SP1, Excel 2016… CVSS 3.0HIGH 7.8
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences