CVE-2019-9845: MadsKristensen.AspNetCore.Miniblog subject to Improper Input Validation

Severity: Critical

CVSS Score: 9.8

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.