Authenticated code execution via improper authorization
Published Jan 14, 2025 · Updated Jun 9, 2026
Improper authorization in Microsoft SharePoint Server allows remote authenticated users with Site Owner rights to execute code remotely. Microsoft identifies the weakness as improper authorization but has not disclosed the vulnerable handler, accepted input, or failed authorization operation. Exploitation requires Site Owner or higher privileges and runs code in the SharePoint Server context, enabling control of server data and service operation.
Summary
What happened
Improper authorization in Microsoft SharePoint Server allows remote authenticated users with Site Owner rights to execute code remotely. Microsoft identifies the weakness as improper authorization but has not disclosed the vulnerable handler, accepted input, or failed authorization operation. Exploitation requires Site Owner or higher privileges and runs code in the SharePoint Server context, enabling control of server data and service operation.
The record
- CVE
- CVE-2025-21348
- Published
- Jan 14, 2025
- Updated
- Jun 9, 2026
- Vendor
- Microsoft
- Product
- Microsoft SharePoint Enterprise Server 2016
- Classifications
- CWE-285, T1190
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Jan 14, 2025CVE publishedPublication date reported by the CVE source.
- Jun 9, 2026Record 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.
- Affected versionversion=16.0.0 <16.0.5483.1001
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.
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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