Are there any known pitfalls or bugs related to session handling in PHP that could lead to unauthorized access?

One common pitfall related to session handling in PHP is session fixation, where an attacker sets the session ID before the session starts, allowing them to hijack the session. To prevent this, regenerate the session ID on login to ensure a new session is created each time. 

session_start();

// Regenerate session ID on login
if(isset($_SESSION['logged_in']) && $_SESSION['logged_in'] == true) {
    session_regenerate_id();
}

Keywords

session handling security vulnerabilities unauthorized access PHP bugs session hijacking

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