All vulnerabilities
CVE-2023-29357

Microsoft SharePoint Server Privilege Escalation Vulnerability

Microsoft SharePoint ServerApplications & CMS
Open in ThreatlineRecord JSON
CVSS
9.8Critical
ExploitationExploited in the wildAdded to KEV 10 Jan 2024. Known ransomware useCISA KEV
Exploit odds (EPSS)>99.9%Chance of exploitation activity in the next 30 days, higher than 99.9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in16.0.10399.20005Fixed versionCVE List
Federal deadline31 Jan 2024Remediation due date for US federal agenciesCISA KEV
CISA required actionApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. CISA KEV

What fixes it

  • 16.0.10399.20005Microsoft SharePoint Server 2019CVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Timeline

  1. 1 May 2023Exploit code publicMetasploit
  2. 13 Jun 2023, 23:26 UTCPublishedCVE List
  3. 10 Jan 2024Added to CISA KEVCISA KEV

Public exploit code and templates 2

  • Exploit moduleSharepoint Dynamic Proxy Generator Unauth RCE 1 May 2023Metasploit
  • Scanner templateMicrosoft SharePoint - Authentication BypassNuclei

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

Microsoft SharePoint Server contains an unspecified vulnerability that allows an unauthenticated attacker, who has gained access to spoofed JWT authentication tokens, to use them for executing a network attack. This attack bypasses authentication, enabling the attacker to gain administrator privileges.

Text from CVE List

Affected versions 1

  • Microsoft SharePoint Server 2019affected: 16.0.0 before 16.0.10399.20005CVE List

References 3