EnGenius EWS356-Fit devices through 1.1.30 allow a remote attacker to conduct stored XSS attacks via the Wi-Fi SSID parameters. JavaScript embedded into a vulnerable field is executed when the user clicks the SSID field's corresponding EDIT button.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.