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.
{
"github_reviewed": true,
"severity": "CRITICAL",
"cwe_ids": [
"CWE-20"
],
"nvd_published_at": null,
"github_reviewed_at": "2020-06-16T21:27:35Z"
}