CVE-2020-0976Network attack vector

Authenticated script execution via unsanitized web requests

Published Apr 15, 2020 · Updated Aug 4, 2024

Cross-site scripting in Microsoft SharePoint Foundation 2013 SP1 and Enterprise Server 2016 allows remote authenticated users to run browser script. SharePoint web-request handling returns attacker-controlled input in page content without proper sanitization. A victim must interact with the crafted content, after which the script runs in that user's browser context and can read or alter accessible SharePoint content.

CVSS severity5.4
Medium
EPSS probability2.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Microsoft SharePoint Foundation 2013 SP1 and Enterprise Server 2016 allows remote authenticated users to run browser script. SharePoint web-request handling returns attacker-controlled input in page content without proper sanitization. A victim must interact with the crafted content, after which the script runs in that user's browser context and can read or alter accessible SharePoint content.

The record

CVE
CVE-2020-0976
Published
Apr 15, 2020
Updated
Aug 4, 2024
Vendor
Microsoft
Product
Microsoft SharePoint Foundation
Classifications
T1204
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 15, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2013 Service Pack 1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Microsoft SharePoint Foundationversion=2013 Service Pack 1
Microsoft · Microsoft SharePoint Enterprise Serverversion=2016

Published CVSS scores

3.5NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1204User Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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