# CVE-2018-6409: Path traversal in n/a

> Attackers can read arbitrary files by manipulating the download parameter in MachForm, exposing sensitive stored data.

- **Severity:** Medium 5.3 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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:** 26 May 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-7m97-g8f2-fj9g

## What is CVE-2018-6409?

CVE-2018-6409 is a medium-severity path traversal vulnerability in n/a, published on 26 May 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in Appnitro MachForm before 4.2.3. The module in charge of serving stored files gets the path from the database. Modifying the name of the file to serve on the corresponding ap_form table leads to a path traversal vulnerability via the download.php q parameter.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2018-6409?

It affects 1 product.


Products: Machform Machform.

## How do I fix CVE-2018-6409?

No fix has been published for CVE-2018-6409 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-6409 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-6409 exists.

Public exploit code:

- MachForm < 4.2.3 - SQL Injection / Path Traversal / Upload Bypass (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2024-37762](https://insights.sbomify.com/CVE-2024-37762/): File upload in n/a (critical 9.9)
- [CVE-2018-6410](https://insights.sbomify.com/CVE-2018-6410/): SQL injection in n/a (critical 9.8)
- [CVE-2018-6411](https://insights.sbomify.com/CVE-2018-6411/): SQL injection in n/a (critical 9.8)
- [CVE-2024-37765](https://insights.sbomify.com/CVE-2024-37765/): SQL injection in n/a (high 8.8)
- [CVE-2021-20102](https://insights.sbomify.com/CVE-2021-20102/): Cross-site request forgery in AppNitro Machform (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-6409 and fix it if it is affected.

What it is: CVE-2018-6409 is a medium-severity path traversal vulnerability in n/a, published on 26 May 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-6409 exists.

Affected product: n/a. 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-2018-6409/ (Markdown: https://insights.sbomify.com/CVE-2018-6409/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-6409
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-6409
- OSV: https://osv.dev/vulnerability/CVE-2018-6409

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-6409/
Summaries are generated and may contain mistakes; the official description above is the record.