In FusionPBX up to 4.5.7, the file app\extensions\extensionimports.php uses an unsanitized "querystring" variable coming from the URL, which is reflected in HTML, leading to XSS.
{
"unresolved_ranges": [
{
"extracted_events": [
{
"last_affected": "4.5.7"
}
],
"cpes": [
"cpe:2.3:a:fusionpbx:fusionpbx:*:*:*:*:*:*:*:*"
],
"vendor_product": "fusionpbx:fusionpbx",
"source": "CPE_RANGE"
}
]
}