In FusionPBX up to v4.5.7, the file app\basicoperatorpanel\resources\content.php uses an unsanitized "eavesdrop_dest" variable coming from the URL, which is reflected on 3 occasions in HTML, leading to XSS.
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-16988.json"