An attacker targeting an authenticated user can push him to click on a URL of FusionPBX 4.5.7 specially crafted to get javascript code executed in his browser.
In FusionPBX up to v4.5.7, file app\devices\device_settings.php uses an unsanitized “id” variable coming from the URL which is reflected on 2 occasions in HTML leading to XSS.
Bug ID: https://www.fusionpbx.com/app/tickets/ticket_edit.php?id=a8614e66-95b7-490f-9aa8-10de5f3f9b7d
Fix: https://github.com/fusionpbx/fusionpbx/commit/83622c4ee1d9dd1913e9fb01ce8f060b46a5768a
Issue was reported by Pierre Jourdan on 10/08/2019 and fixed on 13/08/2019 on 4.4 and Master branches by Mark J Crane.
CVE published, NVD base score is 6.1 MEDIUM:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-16978
https://nvd.nist.gov/vuln/detail/CVE-2019-16978
Resp3ct blog 