This tweet is part of a series (#Day13) focusing on attack techniques related to SQL Injection (SQLi). It covers several aspects including an explanation of what SQLi is and how it works, methods to detect SQLi vulnerabilities, different types of SQLi such as Union-based, Boolean-based, and Error-based. The tweet also mentions WAF (Web Application Firewall) bypass techniques specifically related to SQLi and the use of SQLMap, a popular automated tool for SQL injection and database takeover. Additionally, the tweet references hands-on labs for login bypass and Remote Code Execution (RCE), along with tools, payloads, and wordlists useful for bug bounty hunters and security researchers. Although it does not provide a specific bypass payload or WAF vendor, the content is educational for understanding how attackers can detect and bypass defenses against SQLi attacks, and how security professionals can train to identify and exploit such vulnerabilities for ethical hacking and defense.