I recently moved into a new apartment, and I've noticed that four of the cabinet doors "rock" when I open them. It's subtle, and I didn't notice it at first, but then one of the screws actually fell out of one of the hinges! This is because the screws that go into the hinges are loose, and as the hinge rocks, it pushes the screws out.
Here's a GIF of it: https://imgur.com/a/R0BcF8O
What can I do to fix this? I'd prefer to fix it myself just to learn, but please tell me if the risk of damaging the cabinets further is significant because I can just notify the landlord instead.