What is CVE-2022-31943?

CVE-2022-31943 is a critical-severity vulnerability in Mingsoft Mcms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2022-07-01.

How severe is CVE-2022-31943?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2022-31943 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Arbitrary file upload in Mingsoft Mcms

CVE-2022-31943

MCMS v5.2.8 was discovered to contain an arbitrary file upload vulnerability.

Vulnerability class: Unrestricted File Upload

Published 2022-07-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.015 (73.5th percentile), scored 2026-09-25.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: -0.000

Affected products

Mingsoft Mcms — versions 5.2.8

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

References

github.com/ming-soft/MCMS/issues/95 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2022-31943?: CVE-2022-31943 is a critical-severity vulnerability in Mingsoft Mcms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2022-07-01.
How severe is CVE-2022-31943?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2022-31943 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.