WordPress unknown posts pending

Hello BHW users, something strange happened today... as i usually when i wake up am writing one unique post on my website but somehow today when i opened my admin panel i got a bunch of "pending posts" waiting to be published... the posts are coming from more than one website with links at the end to the original post site. Anyone can explain me how is this possible?

Looks like you have an aggregator plugin turned on. Would be difficult to diagnose without looking at the backend.

Has anyone else got access to your login details, or a separate login for the site?

BlogPro said:

Looks like you have an aggregator plugin turned on. Would be difficult to diagnose without looking at the backend.

Click to expand...

Oh god I really forget that Yes its RSS Post Importer plugin