/bin/login.php in the Web Panel on the Airtame HDMI dongle with firmware before 3.0 allows an attacker to set his own session id via a "Cookie: PHPSESSID=" header. This can be used to achieve persistent access to the admin panel even after an admin password change.
https://www.utkusen.com/blog/multiple-vulnerabilities-on-airtame-device-before-version-3.html