CVE-2020-1148Network attack vector

Authenticated cross-site scripting via unsanitized web request

Published Jun 9, 2020 · Updated Aug 4, 2024

Cross-site scripting in Microsoft SharePoint Server 2010 SP2, 2013 SP1, 2016, and 2019 allows remote authenticated users to run script. The SharePoint web-request sanitizer fails to neutralize attacker-controlled content before it is incorporated into a generated page. Exploitation requires an authenticated request and user interaction; successful attacks execute script in the affected user's browser context and can spoof displayed content.

CVSS severity5.4
Medium
EPSS probability1.40%
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 Server 2010 SP2, 2013 SP1, 2016, and 2019 allows remote authenticated users to run script. The SharePoint web-request sanitizer fails to neutralize attacker-controlled content before it is incorporated into a generated page. Exploitation requires an authenticated request and user interaction; successful attacks execute script in the affected user's browser context and can spoof displayed content.

The record

CVE
CVE-2020-1148
Published
Jun 9, 2020
Updated
Aug 4, 2024
Vendor
Microsoft
Product
Microsoft SharePoint Server
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 9, 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=2010 Service Pack 2
  2. Affected versionversion=2019

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Microsoft SharePoint Serverversion=2010 Service Pack 2; version=2019
Microsoft · Microsoft SharePoint Enterprise Serverversion=2013 Service Pack 1; version=2016

Published CVSS scores

5.4NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NIST National Vulnerability DatabaseAV:N/AC:M/Au:S/C:N/I:P/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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