Is CVE-2021-31181 in the CISA KEV catalog?

No. CVE-2021-31181 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-31181?

CVE-2021-31181 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2021-31181?

CVE-2021-31181 has an EPSS score of 30.04% (98th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2021-31181

HIGHEPSS 98th pctl

8.8

CVSS v3

NVD

Description

Microsoft SharePoint Remote Code Execution Vulnerability

CWE-94Code Injection

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

30.04%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% of all known CVEs.

References

http://packetstormsecurity.com/files/163208/Microsoft-SharePoint-Unsafe-Control-And-ViewState-Remote-Code-Execution.html
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31181
https://www.zerodayinitiative.com/advisories/ZDI-21-573/
https://packetstorm.news/files/id/163208

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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 2025-02-28.