Failing to use .htaccess files (in Apache) to restrict access or deny listing.
When an attacker or curious user searches for intitle:index.of private full , they are looking for directory listings that contain folders named private or full — or files with those terms in their names. These terms suggest: intitle index of private full
Using search operators to find open directories is not illegal in itself. However, the data found within them can be illegal. Failing to use