Authenticated privilege escalation via undisclosed access-control flaw
Published Feb 14, 2023 · Updated Aug 19, 2026
Improper access control in Microsoft SharePoint Server allows remote authenticated users to elevate privileges through network requests. Microsoft has not disclosed the affected code locus or the incorrect access-control operation performed on request data. A low-privileged SharePoint account is required, but Microsoft has not bounded the resulting elevated role or actions.
Summary
What happened
Improper access control in Microsoft SharePoint Server allows remote authenticated users to elevate privileges through network requests. Microsoft has not disclosed the affected code locus or the incorrect access-control operation performed on request data. A low-privileged SharePoint account is required, but Microsoft has not bounded the resulting elevated role or actions.
The record
- CVE
- CVE-2023-21717
- Published
- Feb 14, 2023
- Updated
- Aug 19, 2026
- Vendor
- Microsoft
- Product
- Microsoft SharePoint Foundation 2013
- Classifications
- CWE-284, T1068
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 14, 2023CVE publishedPublication date reported by the CVE source.
- Aug 19, 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=15.0.0 <15.0.5529.1000
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.
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Technologies
Your stack
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Your stack
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