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CRITICAL severity

CVE-2022-31943 — ms-mcms

CRITICAL

CVE-2022-31943 is a critical-severity (CVSS 9.8) Unrestricted File Upload vulnerability in net.mingsoft:ms-mcms. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Unrestricted Upload of File with Dangerous Type in MCMS

Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
1 known
Exploitation data as of Nov 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.5%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs75th percentile — riskier than 75% of all scored CVEsHighest risk
0.00%0.68%1.36%2.04%0.5%1.5%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
☕net.mingsoft:ms-mcms

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

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

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
☕Mavennet.mingsoft:ms-mcmsall versionsNo fix

Affected Products

1 product · 1 configurations
Application
mcmsmingsoft
1 version
5.2.8
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

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

github.comNVDJul 2022

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for net.mingsoft:ms-mcms, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of net.mingsoft:ms-mcms for CVE-2022-31943. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    Treat uploaded files as untrusted until proven otherwise: validate the actual content type rather than the supplied extension, store uploads outside the web root on a volume mounted without execute permission, and rename them to server-generated identifiers so an attacker cannot choose the path a request will later resolve.

Frequently Asked Questions

MCMS v5.2.8 was discovered to contain an arbitrary file upload vulnerability.
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CVE-2022-31943: ms-mcms (Critical 9.8)