Uninvited attendees joined my zoom meeting that has already taken place

I was notified via 2 seperate emails that 2 attendees whom I dont recognise joined a zoom meeting I organised that took place 24 hours ago.

There were 3 attendees to the meeting and none of them recognised these 2 strangers, could somebody tell me how these 2 uninvited attendees got hold of the zoom link?

Thank you