(1) wp-dbmanager.php and (2) database-manage.php in the WP-DBManager (aka Database Manager) plugin before 2.7.2 for WordPress place credentials on the mysqldump command line, which allows local users to obtain sensitive information by listing the process.
https://wordpress.org/plugins/wp-dbmanager/#developers
https://github.com/lesterchan/wp-dbmanager/commit/7037fa8f61644098044379190d1d4bf1883b8e4a