Is CVE-2021-31950 in the CISA KEV catalog?

No. CVE-2021-31950 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-31950?

CVE-2021-31950 has a CVSS v3 base score of 7.6 (HIGH).

What is the EPSS score for CVE-2021-31950?

CVE-2021-31950 has an EPSS score of 4.56% (90th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-31950?

Install KB5001946 for Microsoft SharePoint Enterprise Server 2016. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2021-31950

HIGHEPSS 90th pctl

7.6

CVSS v3

NVD

Description

Microsoft SharePoint Server Spoofing Vulnerability

CWE-918Server-Side Request Forgery (SSRF)

How to fix

Remediation Available

Microsoft SharePoint Enterprise Server 2016Microsoft

Install:KB5001946Microsoft

Microsoft SharePoint Foundation 2013 Service Pack 1Microsoft

Install:KB5001962Microsoft

Microsoft SharePoint Server 2019Microsoft

Install:KB5001944Microsoft

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 InteractionRequired

ScopeChanged

Impact

ConfidentialityHigh

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

4.56%probability of exploitation in 30 days

90thpercentile

High risk: more likely to be exploited than 90% of all known CVEs.

References

Patch1

portal.msrc.microsoft.com

Exploit1

packetstormsecurity.com

Related Vulnerabilities

Other CWE-918 (Server-Side Request Forgery (SSRF)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-21893	High	8.2	100%	KEV + Ransom	-
CVE-2021-40438	Critical	9.0	100%	KEV	Fix
CVE-2021-34473	Critical	9.1	100%	KEV + Ransom	Fix
CVE-2021-26855	Critical	9.1	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2022-41040	High	8.8	100%	KEV + Ransom	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.