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HIGH severity

CVE-2021-46062 — ms-basic

HIGH

CVE-2021-46062 is a high-severity (CVSS 7.1) vulnerability in net.mingsoft:ms-basic. 1 public exploit reference exists, so weaponization risk is real. A fix is available for net.mingsoft:ms-basic — see the affected versions and patch details below.

MCMS Arbitrary File Deletion vulnerability

Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
1 known
Exploitation data as of Oct 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.8%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs54th percentile — riskier than 54% of all scored CVEsHighest risk
0.00%0.42%0.84%1.27%0.2%0.8%0.8%0.8%Apr 26Oct 26Oct 26

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

How urgent is this, really

CVE-2021-46062 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,386 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

2 pkgs affected
☕net.mingsoft:ms-basic☕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

net.mingsoft:ms-basic is used for plugin management for applications built with Maven for the Mingfei Content Management System (MCMS). ms-basic before 2.1.16 is vulnerable to arbitrary file deletion using POST requests to /template/writeFileContent via the oldFileName parameter. MCMS before 5.2.11 is also vulnerable since it bundles vulnerable versions of ms-basic.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
☕Mavennet.mingsoft:ms-basicall versions2.1.16net.mingsoft:ms-basic:2.1.16
☕Mavennet.mingsoft:ms-mcmsall versions5.2.11net.mingsoft:ms-mcms:5.2.11

Affected Products

1 product · 1 configurations
Application
mcmsmingsoft
1 version
5.2.5
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 v5.2.5 was discovered to contain an arbitrary file deletion vulnera…

github.comNVDFeb 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-basic, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update net.mingsoft:ms-basic to 2.1.16 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-46062 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

`net.mingsoft:ms-basic` is used for plugin management for applications built with Maven for the [Mingfei Content Management System (MCMS)](https://gitee.com/mingSoft/MCMS). ms-basic before 2.1.16 is vulnerable to arbitrary file deletion using POST requests to `/template/writeFileContent` via the `oldFileName` parameter. MCMS before 5.2.11 is also vulnerable since it bundles vulnerable versions of ms-basic.
O3 Security · Impact-Aware SCA

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CVE-2021-46062: ms-basic — Fixed in 2.1.16