Hi Liam,

So what this alert means is that somewhere, on some website or app, the password that you use for Khan Academy was also used by someone else and involved in a password leak. Your account details specifically were not leaked. It's very improbable, if not definite, that this leak could and would lead back to your password and account here at KA. 

There has been no data leak from KA, so in my personal opinion, there's not too much to be worried about :)
Naturally, if this password has been used on the website with the data leak, then you should definitely change it (It will usually tell you if you use that website with the leak).

If you feel uncomfortable with it still, then by all means change it. Changing it won't harm you, and hurts to take precautions. Ultimately, it's up to you. 

I hope this helps! Please don't hesitate to reach out some more if you have some questions!

Best,
The Anonymous

Ok thanks for letting me know :)