Recurring Apple ID Password Reset Prompt Due to Account Security Concerns

I have been experiencing an ongoing issue with my Apple ID for the past two weeks. Whenever I try to log in with my Apple ID on other devices, I am prompted to change my password. This issue has also occurred on my iPhone, where I've had to change my password multiple times. The message I receive mentions that my account is in danger. Could you please assist me in resolving this problem and provide guidance on how to prevent it from happening in the future?