CVE-2023-29357
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedMicrosoft SharePoint Server Elevation of Privilege Vulnerability
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThis is an elevation of privilege vulnerability in Microsoft SharePoint Server that was actively exploited as a zero-day. The vulnerability allows authenticated remote attackers to execute arbitrary code with elevated privileges, likely through improper authentication or authorization validation.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 2019CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the installed SharePoint Server versionOpen SharePoint Central Administration, navigate to 'System Settings' > 'Manage servers in this farm' to view the exact version number, or use PowerShell: (Get-SPFarm).BuildVersionAffected if The installed version is Microsoft SharePoint Server 2019 (exact version match)
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Confirm SharePoint Web Application is accessibleVerify that SharePoint Web Application services are running via Central Administration > 'System Settings' > 'Manage services on server', or check if the SharePoint sites are reachable over HTTP/HTTPSAffected if SharePoint web applications are running and accessible to authenticated users
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Verify authentication methods configuredCheck the authentication provider settings for your SharePoint Web Applications via Central Administration > 'Application Management' > 'Manage web applications' > 'Authentication Providers'Affected if Any authentication method (Windows, Forms, SAML, etc.) is enabled allowing user access to SharePoint content
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Review farm administrator privilegesUse PowerShell: Get-SPManagedAccount or check Central Administration > 'Security' > 'Manage farm administrators' to see who has elevated privilegesAffected if The environment has multiple user accounts with farm-level or site collection-level administrative access that could be targeted for privilege escalation
Your environment is affected if Microsoft SharePoint Server 2019 is installed and web applications are accessible to authenticated users, as the vulnerability allows privilege escalation from any authenticated user account.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply the Microsoft security updates released in June 2023 for affected SharePoint Server versions. If exploited, investigate for indicators of compromise and remediate accordingly.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-29357 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-29357 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data