CVEs / CVE-2023-29357
CVE-2023-29357: Microsoft SharePoint Server Privilege Escalation Vulnerability
- Known exploited in the CISA KEV catalog since 10 Jan 2024
- critical 9.8 CVSS 3.1 (from the CNA)
- EPSS 99.9% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
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.
Description
Microsoft SharePoint Server Elevation of Privilege Vulnerability
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Microsoft SharePoint Server 2019 | from 16.0.0, before 16.0.10399.20005 | 16.0.10399.20005 |
Exploitation
| In CISA KEV since | 10 Jan 2024 |
|---|---|
| Due date for US federal agencies | 31 Jan 2024 |
| Used in ransomware campaigns | Known |
| Required action | Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-303 |
References
- CVE-2023-29357 on NVD
- CVE-2023-29357 in the CISA KEV catalog
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-29357 (cited by CISA)
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-29357 Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-29357 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.