MantisBT unauthorized disclosure of private project column configuration

Mantis Bug Tracker (MantisBT) is an open source issue tracker. In versions 2.27.1 and below, due to insufficient access-level checks, any non-admin user with access to manage_config_columns_page.php can use the Copy From action to retrieve the columns configuration from a private project they have no access to. This issue is fixed in version 2.27.2.