Is CVE-2023-29357 in the CISA KEV catalog?

Yes. CVE-2023-29357 is on the CISA Known Exploited Vulnerabilities list, added 2024-01-10, and has known ransomware campaign use.

What is the CVSS severity of CVE-2023-29357?

CVE-2023-29357 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2023-29357?

CVE-2023-29357 has an EPSS score of 99.65% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-29357?

Install KB5002402 for Microsoft SharePoint Server 2019.

CVE & CISA-KEV Catalog

CVE-2023-29357

CRITICALCISA KEVEPSS 100th pctl

9.8

CVSS v3

NVD

Description

Microsoft SharePoint Server Elevation of Privilege Vulnerability

CWE-303

How to fix

Remediation Available

Microsoft SharePoint Server 2019Microsoft

Install:KB5002402Microsoft

Install:KB5002403Microsoft

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

99.65%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Microsoft SharePoint Server Privilege Escalation Vulnerability

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.

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

Remediation due: 2024-01-31

Associated with ransomware campaigns

References

Patch1

msrc.microsoft.com

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-303 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-7593	Critical	9.8	100%	KEV	-
CVE-2020-8863	High	8.8	77%	-	-
CVE-2023-32152	Medium	6.5	29%	-	-
CVE-2023-32148	Medium	6.5	27%	-	-
CVE-2022-20695	Critical	10.0	20%	-	-
CVE-2020-8861	High	8.8	6.5%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-28.