Microsoft SharePoint Server Elevation of Privilege Vulnerability

cisa required action Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

1. 2023-05-01 First public exploit (Metasploit exploit/windows/http/sharepoint_dynamic_proxy_generator_auth_bypass_rce)
2. 2023-06-13 Published
3. 2024-01-10 Added to CISA KEV
4. 2024-01-31 CISA patch deadline
5. 2025-02-04 CISA SSVC: exploitation active

Added

2 y ago (2024-01-10)

Patch by

2024-01-31 (2 y ago)

Ransomware

Known to be used in ransomware campaigns

Required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Vendor, product

Microsoft, SharePoint Server

CISA name

Microsoft SharePoint Server Privilege Escalation Vulnerability

Exploitation

Active, exploited in the wild

Automatable

yes

Technical impact

total

Assessed

21 mo ago (2025-02-04)

99.98% chance of exploitation in the next 30 days, higher than 99.9% of all scored CVEs (FIRST EPSS, 2026-11-08).

• Metasploit exploit/windows/http/sharepoint_dynamic_proxy_generator_auth_bypass_rce Sharepoint Dynamic Proxy Generator Unauth RCE metasploit exploit, excellent rank, 2023-05-01
• Nuclei template Microsoft SharePoint - Authentication Bypass nuclei detection template

• Microsoft Microsoft SharePoint Server 2019

Weakness

• CWE-303 Incorrect Implementation of Authentication Algorithm

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

  vendor-advisory, patch

• cisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-29357

  government-resource, us-government-resource

• CVE List CVE-2023-29357
• NVD CVE-2023-29357

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.