The Order Delivery Date plugin for WordPress may have a security issue that could allow unauthorized changes to be made to important data. This could potentially lead to someone gaining more privileges than they should have. This problem affects versions 2.0 to 12.3.1 (excluding version 12.3.1) of the plugin. This could allow attackers without an account to change certain settings on a WordPress site. They could use this to make themselves an administrator and gain control over the site. Please keep in mind that this only affects the paid version of the plugin.