# CVE-2023-31689: File upload in n/a

> Attackers can upload arbitrary files and write malicious code via crafted requests, leading to remote code execution in Wcms.

- **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:** 22 May 2023
- **Updated:** 28 Jan 2025
- **Also known as:** GHSA-rq34-mcvw-8gj8

## What is CVE-2023-31689?

CVE-2023-31689 is a critical vulnerability in n/a, published on 22 May 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In Wcms 0.3.2, an attacker can send a crafted request from a vulnerable web application backend server /wcms/wex/html.php via the finish parameter and the textAreaCode parameter. It can write arbitrary strings into custom file names and upload any files, and write malicious code to execute scripts to trigger command execution.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2023-31689?

It affects 1 product.


Products: Wcms Wcms.

## How do I fix CVE-2023-31689?

No fix has been published for CVE-2023-31689 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-31689 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-31689 exists.

## Other vulnerabilities in n/a

- [CVE-2020-19902](https://insights.sbomify.com/CVE-2020-19902/): Path traversal in n/a (critical 9.8)
- [CVE-2019-11377](https://insights.sbomify.com/CVE-2019-11377/): File upload in n/a (high 8.8)
- [CVE-2020-24136](https://insights.sbomify.com/CVE-2020-24136/): Path traversal in n/a (high 8.6)
- [CVE-2020-24139](https://insights.sbomify.com/CVE-2020-24139/): Server-side request forgery in n/a (high 8.3)
- [CVE-2020-24140](https://insights.sbomify.com/CVE-2020-24140/): Server-side request forgery in n/a (high 8.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-31689 and fix it if it is affected.

What it is: CVE-2023-31689 is a critical vulnerability in n/a, published on 22 May 2023. 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-2023-31689 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-2023-31689/ (Markdown: https://insights.sbomify.com/CVE-2023-31689/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-31689
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-31689
- OSV: https://osv.dev/vulnerability/CVE-2023-31689

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-31689/
Summaries are generated and may contain mistakes; the official description above is the record.