Unauthenticated security feature bypass
Published Jan 10, 2023 · Updated Feb 28, 2025
Missing authentication in Microsoft SharePoint Server 2016, 2019, and Subscription Edition allows remote attackers to bypass a security feature. Microsoft has not published the affected request handler or the authentication check that accepts untrusted requests without enforcing access control. No credentials or user interaction are required, and the published impact is limited to unauthorized modification without data disclosure or service interruption.
Summary
What happened
Missing authentication in Microsoft SharePoint Server 2016, 2019, and Subscription Edition allows remote attackers to bypass a security feature. Microsoft has not published the affected request handler or the authentication check that accepts untrusted requests without enforcing access control. No credentials or user interaction are required, and the published impact is limited to unauthorized modification without data disclosure or service interruption.
The record
- CVE
- CVE-2023-21743
- Published
- Jan 10, 2023
- Updated
- Feb 28, 2025
- Vendor
- Microsoft
- Product
- Microsoft SharePoint Enterprise Server 2016
- Classifications
- CWE-306
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 10, 2023CVE 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=16.0.0 <16.0.5378.1000
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
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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