A CSRF issue was discovered on Intelbras IWR 3000N 1.5.0 devices, leading to complete control of the router, as demonstrated by v1/system/user.
https://www.exploit-db.com/exploits/46770/
https://1.337.zone/2019/04/08/intelbras-iwr-3000n-1-5-0-csrf-lead-to-router-takeover/