CVE-2023-29357

Microsoft SharePoint Server Privilege Escalation Vulnerability

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.

Required action

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

Notes

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-29357
• https://nvd.nist.gov/vuln/detail/CVE-2023-29357