What is CVE-2020-22755?

CVE-2020-22755 is a high-severity vulnerability in Mingsoft Mcms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2023-05-08.

How severe is CVE-2020-22755?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2020-22755 known to be exploited?

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

Arbitrary file upload in Mingsoft Mcms

CVE-2020-22755

File upload vulnerability in MCMS 5.0 allows attackers to execute arbitrary code via a crafted thumbnail. A different vulnerability than CVE-2022-31943.

Vulnerability class: Unrestricted File Upload

Published 2023-05-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (58.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Mingsoft Mcms — versions 5.0

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

github.com/ming-soft/MCMS (Product)
github.com/ming-soft/MCMS/issues/42 (Exploit, Issue Tracking)

Frequently asked questions

What is CVE-2020-22755?: CVE-2020-22755 is a high-severity vulnerability in Mingsoft Mcms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2023-05-08.
How severe is CVE-2020-22755?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2020-22755 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.