Directory Listing: Many web servers have directory listing disabled by default for security reasons. However, if directory listing is enabled and you're concerned about private images being indexed, you can disable directory listing. The method to do this varies depending on your web server software.
If you find any results, you have a misconfiguration. parent directory index of private images
When you visit a normal website, the web server is programmed to look for a default file—usually index.html or index.php—and display it to you. Directory Listing : Many web servers have directory