# CVE-2021-46428: File upload in n/a

> Attackers can achieve remote code execution by uploading malicious files via the bot_avatar parameter in the Simple Chatbot Application.

- **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:** 27 Jan 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-mm5h-c8p7-5v83

## What is CVE-2021-46428?

CVE-2021-46428 is a critical vulnerability in n/a, published on 27 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A Remote Code Execution (RCE) vulnerability exists in Sourcecodester Simple Chatbot Application 1.0 ( and previous versions via the bot_avatar parameter in SystemSettings.php.

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

## Which versions are affected by CVE-2021-46428?

It affects 1 product.


Products: Simple Chatbot Application Project Simple Chatbot Application.

## How do I fix CVE-2021-46428?

No fix has been published for CVE-2021-46428 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-46428 being exploited?

There is no known exploitation of CVE-2021-46428 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-46427](https://insights.sbomify.com/CVE-2021-46427/): SQL injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-46428 and fix it if it is affected.

What it is: CVE-2021-46428 is a critical vulnerability in n/a, published on 27 Jan 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-2021-46428 in the wild and no public exploit code.

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-2021-46428/ (Markdown: https://insights.sbomify.com/CVE-2021-46428/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-46428
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-46428
- OSV: https://osv.dev/vulnerability/CVE-2021-46428

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-46428/
Summaries are generated and may contain mistakes; the official description above is the record.