Dev blog v1.0 allows to exploit an account takeover through the "user" cookie. With this, an attacker can access any user's session just by knowing their username.

Dev blog v1.0 allows to exploit an XSS through an unrestricted file upload, together with a bad entropy of filenames. With this an attacker can upload a malicious HTML file, then guess the filename of the uploaded file and send it to a potential victim.