Microsoft has announced a new policy to help ensure the security of apps that are available through the Windows Store, Windows Phone Store, Office Store, and Azure Marketplace. The policy, which is effective immediately, requires developers to fix security vulnerabilities in their apps and enables Microsoft to remove an app from sale if the developer does not provide an effective fix. The requirement applies to all apps available in the online stores, including Microsoft apps.

The new policy is part of a Microsoft effort to help ensure that customers can have confidence in the security of the software that is available in our online stores.Microsoft Gives Developers 180 Days To Fix Security Vulnerability In Apps [microsoft.com]