Critical Vulnerability Information 1. SQL Injection Risk - In the file, multiple SQL queries directly use user-supplied parameters without sufficient validation or escaping, posing an SQL injection risk. - Example code: 2. Insecure Password Storage - Passwords are stored using a weak hashing algorithm , and no strong hashing algorithm (such as ) is specified. - Example code: 3. Improper Error Handling - Error messages may disclose sensitive information, such as database structure. - Example code: 4. Session Management Issues - Session management may have security flaws, such as lack of proper session timeout or insufficient protection for session IDs. - Example code: 5. Insecure OTP Logic - The OTP generation and validation logic may be bypassable, as there is no strict control over OTP validity period or retry limits. - Example code: 6. Email Sending Functionality - The email sending feature may be abused, such as no rate limiting or recipient validation. - Example code: These critical findings indicate that the code contains multiple potential security vulnerabilities and requires further code review and remediation.