HexBrain

joola.io · Report #12613

X-Content-Type-Options header missing

Validstatus
2upvotes
8 Jul 2014disclosed

How it was found

Hello Team

The doesn't have a header settings for X-Content-Type Options which means it is vulnerable to MIME sniffing. The only defined value, "nosniff", prevents Internet Explorer and Google Chrome from MIME-sniffing a response away from the declared content-type. This also applies to Google Chrome when downloading extensions. This reduces exposure to drive-by download attacks and sites serving user uploaded content that by clever naming could be treated by MSIE as executable or dynamic HTML files.

This report was disclosed publicly on HackerOne and belongs to its author and the program. See the original