What potential security risks are involved in using .htaccess to protect a directory while displaying external images with embedded authentication?

When using .htaccess to protect a directory, external images with embedded authentication may not be able to access the protected directory. To solve this issue, you can create a PHP script that acts as a proxy to fetch and display the external images while handling the authentication internally. 

<?php
// Check if user is authenticated before serving the image
if (/* authentication logic */) {
    $image_url = $_GET['image_url'];
    
    // Fetch the image from the external URL
    $image = file_get_contents($image_url);

    // Display the image with appropriate headers
    header('Content-Type: image/jpeg');
    echo $image;
} else {
    // Handle authentication failure
    echo 'Unauthorized access';
}
?>

Keywords

.htaccess directory protection external images embedded authentication security risks

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