8.8

CVE-2021-31181: microsoft microsoft sharepoint enterprise server 2016 Code Injection

CVSS: 8.8v3.1HighModified
Published 11-05-2021Last modified 28-02-2025
Open JSON

Vulnerability summary

CVE-2021-31181 is a high (CVSS 8.8) Code Injection vulnerability in microsoft microsoft sharepoint enterprise server 2016. EPSS estimates a 29.01% chance of exploitation in the next 30 days, higher than 98.1% of scored vulnerabilities. 3 public exploits are recorded.

Overall risk
51/100
0100
High · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
29.01%
0%100%
High · -1.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits3reference, metasploit

Timeline

  1. 11-05-2021
    PublishedVulnerability first disclosed.
  2. 28-02-2025
    Last modifiedVulnerability information updated.

Description

Microsoft SharePoint Remote Code Execution Vulnerability

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

29.01%

Chance of exploitation in the next 30 days

Percentile

98%

Versus all other CVEs

30-day change

-1.03 pp

From 30.04% on 19-09-2026

19-09-202619-10-2026
EPSS score
29.01%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

3 found
  • referenceUnverified

    Exploit Reference (packetstorm.news)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (packetstormsecurity.com)

    Maturity: unknown

  • MetasploitMetasploitremoteVerified

    Microsoft SharePoint Unsafe Control and ViewState RCE

    exploit/windows/http/sharepoint_unsafe_control

    Maturity: weaponized

Weaknesses

CWE · root cause

Affected systems

Microsoft6 products

1 vendor · 6 products

References

4 links