What are the potential security risks associated with using sessions in PHP for preventing duplicate actions?

Using sessions in PHP for preventing duplicate actions can pose security risks such as session fixation attacks or session hijacking if not implemented properly. To mitigate these risks, it is important to regenerate the session ID after a successful login or before performing any critical actions to ensure that each session is unique and secure. 

session_start();

if (isset($_SESSION['logged_in']) && $_SESSION['logged_in'] === true) {
    // Regenerate session ID
    session_regenerate_id();
    
    // Perform critical actions
} else {
    // Redirect to login page
    header("Location: login.php");
    exit();
}

Keywords

session hijacking CSRF attacks session fixation session_regenerate_id secure session handling

Related Questions