# CVE-2024-2409: MasterStudy LMS <= 3.3.1 - Unauthenticated Privilege Escalation via stm_lms_register AJAX Action

> Unauthenticated attackers can gain administrator privileges via the registration AJAX action when specific Pro add-ons are enabled.

- **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:** No
- **Published:** 29 Mar 2024
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-62c6-x54m-9q5v

## What is CVE-2024-2409?

CVE-2024-2409 is a critical vulnerability in stylemix MasterStudy LMS WordPress Plugin – for Online Courses and Education, published on 29 Mar 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The MasterStudy LMS plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 3.3.1. This is due to insufficient validation checks within the _register_user() function called by the 'wp_ajax_nopriv_stm_lms_register' AJAX action. This makes it possible for unauthenticated attackers to register a user with administrator-level privileges when MasterStudy LMS Pro is installed and the LMS Forms Editor add-on is enabled.

Weakness: CWE-266 (Incorrect Privilege Assignment)

## Which versions are affected by CVE-2024-2409?

It affects 1 product.


Products: Stylemixthemes Masterstudy Lms.

## How do I fix CVE-2024-2409?

No fix has been published for CVE-2024-2409 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-2409 being exploited?

There is no known exploitation of CVE-2024-2409 in the wild and no public exploit code.

## Other vulnerabilities in stylemix MasterStudy LMS WordPress Plugin – for Online Courses and Education

- [CVE-2024-3136](https://insights.sbomify.com/CVE-2024-3136/): MasterStudy LMS <= 3.3.3 - Unauthenticated Local File Inclusion via template (critical 9.8)
- [CVE-2024-2411](https://insights.sbomify.com/CVE-2024-2411/): MasterStudy LMS <= 3.3.0 - Unauthenticated Local File Inclusion via modal (critical 9.8)
- [CVE-2024-1512](https://insights.sbomify.com/CVE-2024-1512/): MasterStudy LMS WordPress Plugin – for Online Courses and Education <= 3.2.5 - Unauthenticated SQL Injection (critical 9.8)
- [CVE-2022-0441](https://insights.sbomify.com/CVE-2022-0441/): MasterStudy LMS < 2.7.6 - Unauthenticated Admin Account Creation (critical 9.8)
- [CVE-2024-5973](https://insights.sbomify.com/CVE-2024-5973/): MasterStudy LMS < 3.3.24 - Privilege Escalation to Instructor (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-2409 and fix it if it is affected.

What it is: CVE-2024-2409 is a critical vulnerability in stylemix MasterStudy LMS WordPress Plugin – for Online Courses and Education, published on 29 Mar 2024. 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-2024-2409 in the wild and no public exploit code.

Affected product: stylemix MasterStudy LMS WordPress Plugin – for Online Courses and Education. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2024-2409/ (Markdown: https://insights.sbomify.com/CVE-2024-2409/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-2409
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-2409
- OSV: https://osv.dev/vulnerability/CVE-2024-2409

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From sbomify Insights: https://insights.sbomify.com/CVE-2024-2409/
Summaries are generated and may contain mistakes; the official description above is the record.