In FusionPBX up to 4.5.7, the file app\messages\messagesthread.php uses an unsanitized "contactuuid" 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-2019-16971.json"
[ { "events": [ { "introduced": "0" }, { "last_affected": "4.5.7" } ] } ]