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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: WordPress Plugin WPFront Notification Bar 1.9.1.04012 - Stored Cross-Site Scripting (XSS)
# Date: 11/07/2021
# Exploit Author: Swapnil Subhash Bodekar
# Vendor Homepage:
# Software Link: https://wordpress.org/plugins/wpfront-notification-bar/
# Version:  1.9.1.04012
# Tested on Windows
# Category: Web Application

How to reproduce vulnerability:

1. Install WordPress 5.7.2
2. Install and activate  *WPFront Notification Bar* plugin.

3. Navigate to *WPFront Notification Bar *>> Setting >> notification bar and
fill the required data and enter the below-mentioned payload into the Custom
CSS user input field.

</textarea><script>prompt(1)</script>

5. You will observe that the payload successfully got stored into the
database and when you are triggering the same functionality in that time
JavaScript payload is executing successfully and we are getting a pop-up.