Authenticated server-side request forgery via XMLURLDataAdapter
Published Jun 8, 2021 · Updated Aug 3, 2024
Server-side request forgery in Microsoft SharePoint Server allows remote authenticated users to make attacker-chosen HTTP requests. GetXmlDataFromDataSource accepts XMLURLDataAdapter query XML containing an unvalidated URL, method, headers, and body, then fetches the URL and returns its response. Exploitation requires a team-site owner account and user interaction, exposing resources reachable from the SharePoint server or sending requests in its security context.
Summary
What happened
Server-side request forgery in Microsoft SharePoint Server allows remote authenticated users to make attacker-chosen HTTP requests. GetXmlDataFromDataSource accepts XMLURLDataAdapter query XML containing an unvalidated URL, method, headers, and body, then fetches the URL and returns its response. Exploitation requires a team-site owner account and user interaction, exposing resources reachable from the SharePoint server or sending requests in its security context.
The record
- CVE
- CVE-2021-31950
- Published
- Jun 8, 2021
- Updated
- Aug 3, 2024
- Vendor
- Microsoft
- Product
- Microsoft SharePoint Foundation 2013
- Classifications
- CWE-918, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 8, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 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?
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- Affected versionversion=15.0.0 <15.0.5353.1000
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
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
- GetXmlDataFromDataSource SSRF proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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