Threat database

The WPCOM Member WordPress plugin contains an authentication bypass vulnerability in all versions up to and including 1.7.27. This flaw allows unauthenticated attackers to log in as any WordPress user, including administrators, by exploiting the social-login callback handler. The vulnerability arises from missing nonce validation, OAuth state verification, and session namespace isolation, enabling attackers to forge session entries and impersonate users if they know or can enumerate the victim's social provider identifier. Exploitation requires the target site to have at least one social provider configured.

The WPCOM Member plugin for WordPress is vulnerable to authentication bypass via brute force in all versions up to, and including, 1.7.16. This is due to weak OTP (One-Time Password) generation using only 6 numeric digits combined with a 10-minute validity window and no rate limiting on verification attempts. This makes it possible for unauthenticated attackers to brute-force the verification code and authenticate as any user, including administrators, if they know the target's phone number, and the target does not notice or ignores the SMS notification with the OTP.

The WPCOM Member plugin for WordPress is vulnerable to Local File Inclusion in all versions up to, and including, 1.7.14 via the action parameter in one of its shortcodes. This makes it possible for authenticated attackers, with Contributor-level access and above, to include and execute arbitrary .php files on the server, allowing the execution of any PHP code in those files. This can be used to bypass access controls, obtain sensitive data, or achieve code execution in cases where .php file types can be uploaded and included.

The WPCOM Member plugin for WordPress is vulnerable to time-based SQL Injection via the ‘user_phone’ parameter in all versions up to, and including, 1.7.6 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

The WPCOM Member plugin for WordPress is vulnerable to authentication bypass in all versions up to, and including, 1.7.5. This is due to insufficient verification on the 'user_phone' parameter when logging in. This makes it possible for unauthenticated attackers to log in as any existing user on the site, such as an administrator, if SMS login is enabled.

The WPCOM Member plugin for WordPress is vulnerable to privilege escalation in all versions up to, and including, 1.5.2.1. This is due to the plugin allowing arbitrary data to be passed to wp_insert_user() during registration. This makes it possible for unauthenticated attackers to update their role to that of an administrator during registration.