Authenticated script execution via unsanitized web request
Published Mar 12, 2020 · Updated Feb 28, 2025
Cross-site scripting in Microsoft SharePoint Server 2013 SP1, 2016, and 2019 allows remote authenticated users to run script in a victim's browser. SharePoint fails to sanitize a specially crafted web request before returning attacker-controlled content, but Microsoft has not disclosed the affected handler or parameter. Exploitation requires authenticated access and victim interaction; the resulting script can read or alter data available to the victim's SharePoint session.
Summary
What happened
Cross-site scripting in Microsoft SharePoint Server 2013 SP1, 2016, and 2019 allows remote authenticated users to run script in a victim's browser. SharePoint fails to sanitize a specially crafted web request before returning attacker-controlled content, but Microsoft has not disclosed the affected handler or parameter. Exploitation requires authenticated access and victim interaction; the resulting script can read or alter data available to the victim's SharePoint session.
The record
- CVE
- CVE-2020-0893
- Published
- Mar 12, 2020
- Updated
- Feb 28, 2025
- Vendor
- Microsoft
- Product
- Microsoft SharePoint Server
- Classifications
- CWE-79
- 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?
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.
Weakness, pattern, technique
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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