What are the potential security risks associated with using PHP mail handlers and how can they be mitigated?

One potential security risk associated with using PHP mail handlers is the possibility of injection attacks, where malicious code or content is included in the email message. This can lead to various security vulnerabilities, such as cross-site scripting or unauthorized access to sensitive information. To mitigate this risk, it is important to properly sanitize and validate user input before including it in the email message. 

// Sanitize and validate user input before using it in the email message
$subject = filter_var($_POST['subject'], FILTER_SANITIZE_STRING);
$message = filter_var($_POST['message'], FILTER_SANITIZE_STRING);

// Send the email with sanitized input
mail('recipient@example.com', $subject, $message);

Keywords

PHP mail handlers security risks mitigation techniques cross-site scripting email injection

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