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