Is CVE-2023-21717 in the CISA KEV catalog?

No. CVE-2023-21717 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-21717?

CVE-2023-21717 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2023-21717?

CVE-2023-21717 has an EPSS score of 1.09% (62th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-21717?

Install KB5002312 for Microsoft SharePoint Enterprise Server 2013 Service Pack 1. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2023-21717

HIGH

8.8

CVSS v3

NVD

Description

Microsoft SharePoint Server Elevation of Privilege Vulnerability

CWE-284Improper Access Control

How to fix

Remediation Available

Microsoft SharePoint Enterprise Server 2013 Service Pack 1Microsoft

Install:KB5002312Microsoft

Install:KB5002346Microsoft

Install:KB5002347Microsoft

Microsoft SharePoint Enterprise Server 2016Microsoft

Install:KB5002325Microsoft

Install:KB5002350Microsoft

Microsoft SharePoint Foundation 2013 Service Pack 1Microsoft

Install:KB5002347Microsoft

Install:KB5002312Microsoft

Microsoft SharePoint Server 2019Microsoft

Install:KB5002342Microsoft

Install:KB5002330Microsoft

Microsoft SharePoint Server Subscription EditionMicrosoft

Install:KB5002353Microsoft

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 RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.09%probability of exploitation in 30 days

62ndpercentile

Moderate risk: more likely to be exploited than 62% of all known CVEs.

References

Patch1

msrc.microsoft.com

Related Vulnerabilities

Other CWE-284 (Improper Access Control) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-27350	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2019-1653	High	7.5	100%	KEV	-
CVE-2023-23752	Medium	5.3	100%	KEV	Fix
CVE-2023-29298	High	7.5	100%	KEV	-
CVE-2023-38205	High	7.5	100%	KEV	-
CVE-2024-27348	Critical	9.8	99%	KEV	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 2024-11-21.