macOS High Sierra's App Store System Preferences Can Be Unlocked With Any Password [Updated]

A bug report submitted on Open Radar this week has revealed a security flaw in the current version of macOS High Sierra that allows the App Store menu in System Preferences to be unlocked with any password.
MacRumors is able to reproduce the issue on macOS High Sierra version 10.13.2, the latest public release of the operating system, on an administrator-level account by following these steps:• Click on System Preferences.
• Click on App Store.
• Click on the padlock icon to lock