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.
What to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Turn on Microsoft alerts
Details
- Vendor
- Microsoft
- Product
- SharePoint Server
- CVE
- CVE-2023-29357
- Affected versions
- Microsoft SharePoint Server 2019 16.0: from 16.0.0 to 16.0.10399.20005 (excluded) — fixed in 16.0.10399.20005 (from the advisory and NVD; check the exact builds in the official advisory)
- CVSS score
- 9.8
- Actively exploited
- Yes, listed in the CISA Known Exploited Vulnerabilities catalog
- CISA due date
- January 31, 2024 (deadline for US federal agencies: a good benchmark for you too)
- Source
- CISA KEV – original advisory
- Published
- January 10, 2024
The description and the recommended action are quoted from the public advisory; severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.