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\contacts\contact_notes.php uses an unsanitized “id” variable coming from the URL which is reflected in HTML leading to XSS.
Bug ID: https://www.fusionpbx.com/app/tickets/ticket_edit.php?id=31169be4-bb4b-49c2-831d-ef5367f5a1d1
Fix: https://github.com/fusionpbx/fusionpbx/commit/80f2ce087ab1343f1ff3bf8a058eed9b5027eb8c
Issue was reported on 10/08/2019 by Pierre Jourdan 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-2019-16975
https://nvd.nist.gov/vuln/detail/CVE-2019-16975
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