Wavelog exposes the endpoints '/install/ajax.php' and '/install/includes/interface assets/triggers.php' after installation without requiring an installation lock or permission check. Unsanitized input reaches the functions `write config()` and `write configfile()` in install/includes/core/core class.php, enabling a remote unauthenticated attacker to read or write log files and insert controlled content into PHP configuration files, which can lead to remote code execution on the server.