Several Newfold plugins are vulnerable to Authentication Bypass. The vulnerability exists because the plugins bundle the wp-module-data module. In the module, the "authenticate()" method — registered on the "rest_authentication_errors" filter and therefore evaluated for every unauthenticated REST API request — performs an HMAC-style Bearer token comparison that degenerates when "HiiveConnection::get_auth_token()" returns "false": PHP coerces "strrev(false)" to "strrev('')", collapsing the secret salt to the publicly known constant "hash('sha256', '') = e3b0c44...", while all remaining hash inputs (HTTP method, request URL, raw request body, and the "X-Timestamp" header) remain fully attacker-controlled. This makes it possible for unauthenticated attackers to compute a valid Bearer token entirely offline, pass the token equality check, and have "wp_set_current_user()" invoked against the first administrator returned by "get_users(['role' => 'administrator'])", granting full administrator-level access and enabling arbitrary REST API operations such as creating new administrator accounts and achieving complete site takeover. Vulnerable versions are WP Plugin Crazy Domains (<= 2.5.2), WP Plugin Web (<= 2.3.4), WP Plugin Hostgator (<= 3.1.0), WP Plugin Bluehost (<= 4.17.1). The affected module is vulnerable in versions up to, and including, 2.9.4.