The Mstore Api plugin for WordPress is vulnerable to Authentication Bypass via JWT Forgery in versions up to, and including, 4.20.0 This is due to missing cryptographic signature verification in the FirebasePhoneAuthHelper::verify_id_token() function, which decodes and validates Firebase ID token claims (alg, kid, aud, iss) but never calls openssl_verify() or any equivalent to validate the JWT signature against Google's actual public key certificates. This makes it possible for unauthenticated attackers to forge a Firebase Phone Auth JWT signed with a self-generated RSA key pair and impersonate any phone number, resulting in unauthorized access to existing WordPress accounts or creation of new arbitrary accounts.
CVE-2026-3568 is an authorization bypass vulnerability in the MStore API WordPress plugin up to version 4.18.3. It arises from the update_user_profile() function processing user-supplied meta_data JSON without validation, allowing authenticated users with Subscriber-level access or higher to modify arbitrary user meta fields on their own accounts. This includes sensitive fields such as wp_user_level, which can be used to escalate privileges, and plugin-specific authorization flags. The vulnerability does not allow direct exploitation of wp_capabilities but does permit modification of simpler meta keys. The CVSS score is 4.3, indicating medium severity. No official patch or remediation guidance is currently available from the vendor.
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 create_blog 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 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 SQL Injection via the 'status_type' parameter in all versions up to, and including, 4.15.7 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with Subscriber-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.
The MStore API – Create Native Android & iOS Apps On The Cloud plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the update_user_profile() function in all versions up to, and including, 4.15.3. This makes it possible for authenticated attackers, with subscriber-level access and above, to upload arbitrary files (not including PHP files) on the affected site's server which may make remote code execution possible. This can be paired with a registration endpoint for unauthenticated users to exploit the issue.
The MStore API – Create Native Android & iOS Apps On The Cloud plugin for WordPress is vulnerable to unauthorized user registration in all versions up to, and including, 4.15.3. This is due to the plugin not checking that user registration is enabled prior to creating a user account through the register() function. This makes it possible for unauthenticated attackers to create user accounts on sites, even when user registration is disabled and plugin functionality is not activated.
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 'verify_id_token' 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 'firebase_sms_login' and 'firebase_sms_login_v2' 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.