Umbraco Cloud 8.5.3 allows an authenticated file upload (and consequently Remote Code Execution) via the Install Packages functionality.
{
"extracted_events": [
{
"cpe": "cpe:2.3:a:umbraco:umbraco_cms:8.5.3:*:*:*:*:*:*:*",
"range": [
{
"introduced": "8.5.3"
},
{
"last_affected": "8.5.3"
}
],
"source": "CPE_STRING"
}
]
}