# CVE-2021-29465: Remote file overwrite on discord-recon can result in DoS and Remote Code Execution

> A remote attacker can overwrite system files via command injection in Discord-Recon, leading to remote code execution or denial of service.

- **Severity:** High 8.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Apr 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-6pp2-rpj3-jcjx

## What is CVE-2021-29465?

CVE-2021-29465 is a high-severity command injection vulnerability in DEMON1A Discord-Recon, published on 22 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Discord-Recon is a bot for the Discord chat service. Versions of Discord-Recon 0.0.3 and prior contain a vulnerability in which a remote attacker is able to overwrite any file on the system with the command results. This can result in remote code execution when the user overwrite important files on the system. As a workaround, bot maintainers can edit their `setting.py` file then add `<` and `>` into the `RCE` variable inside of it to fix the issue without an update. The vulnerability is patched in version 0.0.4.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command), CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2021-29465?

It affects 1 product.


Products: Discord Discord-Recon.

## How do I fix CVE-2021-29465?

No fix has been published for CVE-2021-29465 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-29465 being exploited?

There is no known exploitation of CVE-2021-29465 in the wild and no public exploit code.

## Other vulnerabilities in DEMON1A Discord-Recon

- [CVE-2021-29466](https://insights.sbomify.com/CVE-2021-29466/): Path Traversal at Discord-Recon .recon Command Path (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-29465 and fix it if it is affected.

What it is: CVE-2021-29465 is a high-severity command injection vulnerability in DEMON1A Discord-Recon, published on 22 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-29465 in the wild and no public exploit code.

Affected product: DEMON1A Discord-Recon. 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-2021-29465/ (Markdown: https://insights.sbomify.com/CVE-2021-29465/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-29465
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-29465
- OSV: https://osv.dev/vulnerability/CVE-2021-29465

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-29465/
Summaries are generated and may contain mistakes; the official description above is the record.