What is CVE-2021-31181?

CVE-2021-31181 is a high-severity software vulnerability (Code injection) with a CVSS score of 8.8. Microsoft SharePoint Remote Code Execution Vulnerability

Is CVE-2021-31181 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 30%.

What products does CVE-2021-31181 affect?

Tracked products affected include Microsoft SharePoint Server. Check the version you run to see whether it is affected.

How do I fix CVE-2021-31181?

Apply the vendor fix promptly. An official patch or advisory is available. Upgrade affected products to a fixed version.

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CVE-2021-31181

HIGH severity · CVSS 8.8 · Code injection

8.8CVSS HIGH

Summary

Microsoft SharePoint Remote Code Execution Vulnerability

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredLow

User interactionNone

Confidentiality impactHigh

Integrity impactHigh

Availability impactHigh

Exploit probability (EPSS)30%

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

Affected products we track (1)

Microsoft SharePoint Server

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31181 ↗

Additional information

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