CVE-2019-9842: Miniblog Project Miniblog

High severity, CVSS 7.2. EPSS: 2.2% chance of exploitation in the next 30 days.

madskristensen MiniBlog through 2018-05-18 allows remote attackers to execute arbitrary ASPX code via an IMG element with a data: URL, because SaveFilesToDisk in app_code/handlers/PostHandler.cs writes a decoded base64 string to a file without validating the extension.

Affected products

• Miniblog Project Miniblog: up to and including 2018-05-18

Published 2019-06-14. Last modified 2026-06-17.