[A user claimed that he lost more than 20 ETH by storing his mnemonic phrase in LastPass] According to news on October 12, Twitter user flippen.eth warned that he lost more than 20 ETH overnight by storing his mnemonic phrase in LastPass, a password management tool. ETH. He said the problem appears to have become widespread. He suggested that if users have ever used LastPass, now is the time to stop using it, update their passwords, and ditch the wallets in which they store their mnemonic phrases.