word to describe a quote often attributed to but not verified to a person

I have seen this word many times but can’t for the life of me able to remember. The word refers to a quote which is often attributed to someone but no one can verify whether the person actually said so.

Let me give an example. Einstein (that word) “Everybody is a genius. But if you judge a fish by its ability to climb a tre……”

It is very likely that I am getting it mixed up. I am not quite sure I am looking for the word aphorism

Please kindly help !!