Umbraco Cloud 8.5.3 allows an authenticated file upload (and consequently Remote Code Execution) via the Install Packages functionality.
{
"github_reviewed_at": "2023-07-13T17:07:47Z",
"github_reviewed": true,
"severity": "HIGH",
"nvd_published_at": "2020-03-16T20:15:00Z",
"cwe_ids": [
"CWE-434"
]
}