If you are a Weebly.com customer you should go and change your password. If your Weebly password is shared with any other accounts. You should also change the password for those accounts. LeakedSource has data obtained from a security breach at Weebly in February of 2016.
The data was was taken from Weebly includes: usernames, passwords, email addresses, and IP addresses. The Weebly user passwords were salted. There were over 43 million Weebly user accounts that were affected.
Weebly has tighten their security since the breach occurred.