Twitter said that its data has not been breached, and LeakedSource explained that Twitter user credentials and passwords might have been gotten from browsers that store passwords. The full story is on Time.
“In a blog post, LeakedSource said the dataset included passwords from people who had signed up to Twitter as recently as 2014, but the passwords had been stored in “plaintext,” with no attempt to encrypt them. In line with being a large, prominent web firm, Twitter isn’t so careless with its customers’ data.”
The article goes on to explain that passwords might have been obtained when people allow their browser to keep track of their passwords.
Most of the Twitter data seemed to be from accounts in Russia, but it’s always better to be safe than sorry.