Add Options -Indexes to your .htaccess file.
Attackers can see internal naming conventions, project structures, and file paths.
If a directory is open, search engines like Google may index these private images, making them discoverable via specific search queries (often called "dorks"). How to Prevent Private Directory Indexing
Set autoindex off; in your server block configuration. Parent Directory Index Of Private Sex - Google Groups
To secure your images and prevent them from appearing in public indexes, follow these industry-standard practices: 1. Disable Directory Listing (Server Level)
The most effective method is to tell your server never to generate an index page.