# CVE-2021-46384: Remote code execution in net.mingsoft:ms-mcms

> Unauthenticated attackers can execute arbitrary code via Freemarker template injection, leading to full system takeover.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 4 Mar 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-qwh6-xwj4-9cjg

## What is CVE-2021-46384?

CVE-2021-46384 is a critical code injection vulnerability in n/a, published on 4 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

https://gitee.com/mingSoft/MCMS MCMS <=5.2.5 is affected by: RCE. The impact is: execute arbitrary code (remote). The attack vector is: ${"freemarker.template.utility.Execute"?new()("calc")}. ¶¶ MCMS has a pre-auth RCE vulnerability through which allows unauthenticated attacker with network access via http to compromise MCMS. Successful attacks of this vulnerability can result in takeover of MCMS.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2021-46384?

2 open source packages ship an affected version, including net.mingsoft:ms-mcms. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `net.mingsoft:ms-mcms` | Maven | All versions | 5.2.6 |
| `net.mingsoft:ms-mcms` | Maven | All versions | 5.2.6 |

Products: Mingsoft Mcms.

## How do I fix CVE-2021-46384?

Upgrade net.mingsoft:ms-mcms to 5.2.6 or later.

## Is CVE-2021-46384 being exploited?

There is no known exploitation of CVE-2021-46384 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2025-56316](https://insights.sbomify.com/CVE-2025-56316/): MCMS vulnerable SQL injection via the content_title parameter (critical 9.8)
- [CVE-2025-29287](https://insights.sbomify.com/CVE-2025-29287/): MCMS allows arbitrary file uploads in the ueditor component (critical 9.8)
- [CVE-2023-50578](https://insights.sbomify.com/CVE-2023-50578/): Mingsoft MCMS SQL injection (critical 9.8)
- [CVE-2020-20913](https://insights.sbomify.com/CVE-2020-20913/): Ming-Soft MCMS vulnerable to SQL injection (critical 9.8)
- [CVE-2022-36272](https://insights.sbomify.com/CVE-2022-36272/): Mingsoft MCMS SQL injection vulnerability in /mdiy/page/verify URI via fieldName parameter (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-46384 and fix it if it is affected.

What it is: CVE-2021-46384 is a critical code injection vulnerability in n/a, published on 4 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-46384 in the wild and no public exploit code.

Affected packages and fixed versions:
- net.mingsoft:ms-mcms (Maven): affected all versions; fixed in 5.2.6
- net.mingsoft:ms-mcms (Maven): affected all versions; fixed in 5.2.6

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-46384/ (Markdown: https://insights.sbomify.com/CVE-2021-46384/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-46384
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-46384
- OSV: https://osv.dev/vulnerability/CVE-2021-46384

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-46384/
Summaries are generated and may contain mistakes; the official description above is the record.