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CVE-2020-16946

26
FAUCET Score

CVE-2020-16946 is a cross-site scripting (XSS) vulnerability affecting Microsoft SharePoint Server, SharePoint Designer, and SharePoint Foundation. An authenticated attacker can exploit this by sending a specially crafted web request, leading to high impact on confidentiality and integrity. The CVSS score is 8.7 (High), indicating a network-based attack with low privileges required, but user interaction is necessary. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has received some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
2013CPE matchmatch criteria
cpe:2.3:a:microsoft:sharepoint_designer:2013:sp1:*:*:*:*:*:*
2016CPE matchmatch criteria
cpe:2.3:a:microsoft:sharepoint_enterprise_server:2016:*:*:*:*:*:*:*
2010CPE matchmatch criteria
cpe:2.3:a:microsoft:sharepoint_foundation:2010:sp2:*:*:*:*:*:*
2019CPE matchmatch criteria
cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.7HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
5.8
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.61%
Probability of exploitation in next 30 days
EPSS Percentile
73.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0161 is in the 89th percentile among its peer group of 890 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft SharePoint Enterprise Server 2016
View patch
microsoftpatch availablevia msrc
Product: Microsoft SharePoint Server 2019
View patch
microsoftpatch availablevia msrc
Product: Microsoft SharePoint Foundation 2010 Service Pack 2
View patch
microsoftpatch availablevia msrc
Product: Microsoft SharePoint Foundation 2013 Service Pack 1
View patch

Vendor Advisories (1)

microsoft2020-Oct/CVE-2020-16946Important

Microsoft Office SharePoint XSS Vulnerability

Oct 13, 2020

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2020-16946
PatchVendor Advisory