Authenticated script execution via unsanitized web request
Published Mar 12, 2020 · Updated Feb 28, 2025
Cross-site scripting in Microsoft SharePoint 2010 SP2, 2013 SP1, 2016, and 2019 allows remote authenticated users to execute script via crafted requests. SharePoint reflects attacker-controlled request content into a page without proper sanitization, although Microsoft does not identify the affected handler or parameter. Exploitation requires SharePoint credentials and victim interaction; execution remains within the victim's browser security context.
Summary
What happened
Cross-site scripting in Microsoft SharePoint 2010 SP2, 2013 SP1, 2016, and 2019 allows remote authenticated users to execute script via crafted requests. SharePoint reflects attacker-controlled request content into a page without proper sanitization, although Microsoft does not identify the affected handler or parameter. Exploitation requires SharePoint credentials and victim interaction; execution remains within the victim's browser security context.
The record
- CVE
- CVE-2020-0891
- Published
- Mar 12, 2020
- Updated
- Feb 28, 2025
- Vendor
- Microsoft
- Product
- Microsoft SharePoint Server
- Classifications
- CWE-79, T1203
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 12, 2020CVE publishedPublication date reported by the CVE source.
- Feb 28, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=2019
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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