I've checked out and briefly used Mortimer ( https://github.com/aiaio/mortimer ) before and it seems a decent tool.
"mortimer is a password storage application that supports multiple users and basic permissions. The app relies on public key cryptography to facilitate a multi-user password system whose data remains secure even if the database is compromised. Admin users have permission to all password entries on the system. Users may be given permission on a password-group basis."