CyberRota Analysis
AI-GeneratedThe User Profile Builder plugin for WordPress is vulnerable to an authentication bypass due to a type confusion issue that allows unauthenticated attackers to log in as the site's Administrator. This critical flaw arises from improper handling of error responses during user registration, enabling attackers to exploit the system and gain full administrative control. WordPress site administrators using this plugin should prioritize patching to mitigate the risk of unauthorized access.
Original NVD Description
The User Profile Builder plugin for WordPress is vulnerable to Authentication Bypass via Type Confusion in versions up to, and including, 3.16.4. This is due to the wppb_log_in_user() function calling absint() on the return value of wp_insert_user() before performing an is_wp_error() check — when a registration is submitted with a 61–70 character username, WordPress core rejects it with a WP_Error object, but absint() coerces that object to the integer 1 before the error check can short-circuit execution, causing the plugin to bind and return a transient-backed autologin nonce tied to user ID 1. This makes it possible for unauthenticated attackers to log in as the site's Administrator account (user ID 1), resulting in full administrative takeover of the site.