Authenticated script execution via unsanitized web request
Published Apr 15, 2020 · Updated Feb 28, 2025
Cross-site scripting in Microsoft SharePoint 2013 SP1, 2016, and 2019 allows remote authenticated users to inject script via a crafted request. The request-processing path fails to sanitize attacker-controlled request content before returning it in a page; Microsoft has not disclosed the endpoint or parameter. Exploitation requires a SharePoint account and another user to load the affected page, allowing script to read or modify data available to that user's session.
Summary
What happened
Cross-site scripting in Microsoft SharePoint 2013 SP1, 2016, and 2019 allows remote authenticated users to inject script via a crafted request. The request-processing path fails to sanitize attacker-controlled request content before returning it in a page; Microsoft has not disclosed the endpoint or parameter. Exploitation requires a SharePoint account and another user to load the affected page, allowing script to read or modify data available to that user's session.
The record
- CVE
- CVE-2020-0978
- Published
- Apr 15, 2020
- Updated
- Feb 28, 2025
- Vendor
- Microsoft
- Product
- Microsoft SharePoint Server
- Classifications
- CWE-79, T1189
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 15, 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
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Technologies
Your stack
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Your stack
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