In BlackCat CMS 1.2.2, unrestricted file upload is possible in backend\media\ajax_rename.php via the extension parameter, as demonstrated by changing the extension from .jpg to .php.
{
"cpe": "cpe:2.3:a:blackcat-cms:blackcat_cms:1.2.2:*:*:*:*:*:*:*",
"extracted_events": [
{
"introduced": "1.2.2"
},
{
"last_affected": "1.2.2"
}
],
"source": "CPE_STRING"
}