The MStore API WordPress plugin before 4.22.1 does not restrict which fields of an order a customer may update, allowing any authenticated user with a self-registerable account to change the status of their own unpaid order to a paid or fulfilled state and receive the goods without paying.

The MStore API – Create Native Android & iOS Apps On The Cloud plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the createblog function in all versions up to, and including, 4.17.5. This makes it possible for authenticated attackers, with Subscriber-level access and above, to create new posts.

The MStore API – Create Native Android & iOS Apps On The Cloud plugin for WordPress is vulnerable to limited privilege escalation in all versions up to, and including, 4.17.4. This is due to a lack of restriction of role when registering. This makes it possible for unauthenticated attackers to to register with the 'wcfmvendor' role, which is a Store Vendor role in the WCFM Marketplace – Multivendor Marketplace for WooCommerce plugin for WordPress. The vulnerability can only be exploited if the WCFM Marketplace – Multivendor Marketplace for WooCommerce plugin is installed and activated. The vulnerability was partially patched in version 4.17.3.

The MStore API – Create Native Android & iOS Apps On The Cloud plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the profile picture upload functionality in all versions up to, and including, 4.16.4 due to insufficient file type validation. This makes it possible for authenticated attackers, with subscriber-level access and above, to upload HTML files with arbitrary web scripts that will execute whenever a user accesses the file.

The MStore API – Create Native Android & iOS Apps On The Cloud plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 4.15.2. This is due to the use of loose comparison in the 'verifyidtoken' function. This makes it possible for unauthenticated attackers to log in as any existing user on the site, such as an administrator, if they have access to an @flutter.io email address or phone number. This also requires firebase to be configured on the website and the user to have set up firebase for their account.

The MStore API – Create Native Android & iOS Apps On The Cloud plugin for WordPress is vulnerable to authentication bypass in all versions up to, and including, 4.14.7. This is due to insufficient verification on the 'phone' parameter of the 'firebasesmslogin' and 'firebasesmsloginv2' functions. This makes it possible for unauthenticated attackers to log in as any existing user on the site, such as an administrator, if they have access to the email address or phone number. Additionally, if a new email address is supplied, a new user account is created with the default role, even if registration is disabled.