In PrestaShop from version 1.6.0.1 and before version 1.7.6.6, the dashboard allows rewriting all configuration variables. The problem is fixed in 1.7.6.6
In PrestaShop from version 1.7.0.0 and before version 1.7.6.6, if a target sends a corrupted file, it leads to a reflected XSS. The problem is fixed in 1.7.6.6
In PrestaShop from version 1.5.0.0 and before version 1.7.6.6, the authentication system is malformed and an attacker is able to forge requests and execute admin commands. The problem is fixed in 1.7.6.6.