In FusionPBX up to v4.5.7, the file resources\download.php uses an unsanitized "f" variable coming from the URL, which takes any pathname and allows a download of it. (resources\secure_download.php is also affected.)
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-16986.json"
[ { "events": [ { "introduced": "0" }, { "last_affected": "4.5.7" } ] } ]