madskristensen Miniblog.Core through 2019-01-16 allows remote attackers to execute arbitrary ASPX code via an IMG element with a data: URL, because SaveFilesToDisk in Controllers/BlogController.cs writes a decoded base64 string to a file without validating the extension.
{ "nvd_published_at": null, "cwe_ids": [ "CWE-20" ], "severity": "CRITICAL", "github_reviewed": true, "github_reviewed_at": "2020-06-16T21:27:35Z" }