ThingsBoard before v3.2 is vulnerable to Host header injection in password-reset emails. This allows an attacker to send malicious links in password-reset emails to victims, pointing to an attacker-controlled server. Lack of validation of the Host header allows this to happen.
https://github.com/thingsboard/thingsboard/commits/master
https://gist.github.com/vin01/26a8bb13233acd9425e7575a7ad4c936