As a security professional, if you find a "parent directory index of private images," you are legally bound to do nothing except report it.
Unlawful actions:
Lawful actions (in most jurisdictions):
Upload a blank index.html file into every empty directory, or use a dynamic script that denies access. Even a file containing <!-- No permissions --> is enough to stop the raw index. parent directory index of private images full
If you are a server administrator, eliminating the risk of "parent directory indexing" takes three minutes. As a security professional, if you find a