Chatend is committed to maintaining customer privacy and takes its security seriously. To that end, there is a Bug Bounty Program to encourage responsible disclosure of any security vulnerabilities.
If you are a security researcher and believe you have found a vulnerability, please submit the following form.
Here are some ideas on where to start:
/api
path?flag.txt
file in that server's home directory. Can you read the file and include its contents in the form? This will immediately win a cash prize.