Description

The application does not escape special characters. The $item->bbcode or $item->name variables can lead to stored XSS

Proof of Concept

Go to Facebook BBCode List (https://demo.livehelperchat.com/site_admin/fbmessenger/newbbcode) and add an item with XSS payload into name or bbcode fields, e.g: a1<img/src/onerror=alert('xss')> XSS will be triggered when view the bbcode list

Impact

XSS can have huge implications for a web application and its users. User accounts can be hijacked, change the html screen and insult the organization. Credentials could be stolen, sensitive data could be exfiltrated, and lastly, access to your client computers can be obtained.