# CVE-2024-0643: Unrestricted upload of dangerous file types in C21 Live Encoder and Live Mosaic

> Remote attackers can upload dangerous file types to C21 Live Encoder, leading to full system compromise.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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:** 17 Jan 2024
- **Updated:** 2 Jun 2025
- **Also known as:** GHSA-gh84-qgjx-4xm7

## What is CVE-2024-0643?

CVE-2024-0643 is a critical vulnerability in Cires21 C21 Live Encoder and Live Mosaic, published on 17 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Unrestricted upload of dangerous file types in the C21 Live Encoder and Live Mosaic product, version 5.3. This vulnerability allows a remote attacker to upload different file extensions without any restrictions, resulting in a full system compromise.

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

## Which versions are affected by CVE-2024-0643?

It affects 1 product.


Products: Cires21 Live Encoder.

## How do I fix CVE-2024-0643?

No fix has been published for CVE-2024-0643 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-0643 being exploited?

There is no known exploitation of CVE-2024-0643 in the wild and no public exploit code.

## Other vulnerabilities in Cires21 C21 Live Encoder and Live Mosaic

- [CVE-2024-0642](https://insights.sbomify.com/CVE-2024-0642/): Inadequate access control in C21 Live Encoder and Live Mosaic (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-0643 and fix it if it is affected.

What it is: CVE-2024-0643 is a critical vulnerability in Cires21 C21 Live Encoder and Live Mosaic, published on 17 Jan 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-2024-0643 in the wild and no public exploit code.

Affected product: Cires21 C21 Live Encoder and Live Mosaic. 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-2024-0643/ (Markdown: https://insights.sbomify.com/CVE-2024-0643/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-0643
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-0643
- OSV: https://osv.dev/vulnerability/CVE-2024-0643

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-0643/
Summaries are generated and may contain mistakes; the official description above is the record.