What Did the LastPass Breach Reveal About Password Manager Security?

This report reviews the LastPass 2022–2023 breach in which attackers executed a two-stage compromise—initially breaching developer accounts and source code, then leveraging a vulnerable third-party package to access a DevOps engineer’s machine and exfiltrate cloud backups, customer metadata, and encrypted vault data; it details what was exposed (encrypted credentials and unencrypted metadata), the supply-chain and human-failure factors that amplified risk, and prescribes lessons for stronger master passphrases, verified zero-knowledge architecture, secure DevOps, and vendor visibility.