A vulnerability exists in RaspAP 2.6 to 2.6.5 in the "iface" GET parameter in /ajax/networking/get_netcfg.php, when the "iface" parameter value contains special characters such as ";" which enables an unauthenticated attacker to execute arbitrary OS commands.
https://github.com/RaspAP/raspap-webgui/blob/master/ajax/networking/get_netcfg.php
https://gist.github.com/omriinbar/52c000c02a6992c6ce68d531195f69cf