In FusionPBX up to v4.5.7, the file app/musiconhold/musiconhold.php uses an unsanitized "file" variable coming from the URL, which takes any pathname (base64 encoded) and allows a download of it.
{
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:fusionpbx:fusionpbx:*:*:*:*:*:*:*:*"
],
"extracted_events": [
{
"last_affected": "4.5.7"
}
],
"vendor_product": "fusionpbx:fusionpbx",
"source": "CPE_RANGE"
}
]
}