# CVE-2024-12427: Multi Step Form <= 1.7.23 - Missing Authorization to Unauthenticated Limited File Upload

> Unauthenticated attackers can upload limited file types due to a missing capability check in the Multi Step Form WordPress plugin.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Jan 2025
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-8979-rxc8-68vq

## What is CVE-2024-12427?

CVE-2024-12427 is a medium-severity missing authorization vulnerability in mondula2016 Multi Step Form, published on 16 Jan 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Multi Step Form plugin for WordPress is vulnerable to unauthorized limited file upload due to a missing capability check on the fw_upload_file AJAX action in all versions up to, and including, 1.7.23. This makes it possible for unauthenticated attackers to upload limited file types such as images.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2024-12427?

It affects 1 product.


Products: Mondula Multi Step Form.

## How do I fix CVE-2024-12427?

No fix has been published for CVE-2024-12427 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-12427 being exploited?

There is no known exploitation of CVE-2024-12427 in the wild and no public exploit code.

## Other vulnerabilities in mondula2016 Multi Step Form

- [CVE-2018-14430](https://insights.sbomify.com/CVE-2018-14430/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2023-50832](https://insights.sbomify.com/CVE-2023-50832/): WordPress Multi Step Form Plugin <= 1.7.13 is vulnerable to Cross Site Scripting (XSS) (medium 5.9)
- [CVE-2024-25905](https://insights.sbomify.com/CVE-2024-25905/): WordPress Multi Step Form Plugin <= 1.7.18 is vulnerable to Cross Site Request Forgery (CSRF) (medium 5.4)
- [CVE-2023-47758](https://insights.sbomify.com/CVE-2023-47758/): WordPress Multi Step Form Plugin <= 1.7.11 is vulnerable to Cross Site Request Forgery (CSRF) (medium 5.4)
- [CVE-2018-14846](https://insights.sbomify.com/CVE-2018-14846/): Cross-site scripting in n/a (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-12427 and fix it if it is affected.

What it is: CVE-2024-12427 is a medium-severity missing authorization vulnerability in mondula2016 Multi Step Form, published on 16 Jan 2025. 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-2024-12427 in the wild and no public exploit code.

Affected product: mondula2016 Multi Step Form. 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-2024-12427/ (Markdown: https://insights.sbomify.com/CVE-2024-12427/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-12427
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-12427
- OSV: https://osv.dev/vulnerability/CVE-2024-12427

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-12427/
Summaries are generated and may contain mistakes; the official description above is the record.