The news about the LastPass network breach has been completely blown out of proportion by the media. None of your private data has been exposed. What may have been exposed was a salted and hashed version of your email address, master pass-phase, per user salts and authentication hashes. All of this appears as random gobbledigook and requires substantial computer power and time to decipher. I doubt any one wants your personal data so bad to put in this much effort. That said you should probably change your master password to be on the safe side. None of your website passwords have not and cannot be accessed because only you have the security keys to unlock them.