Cross-site scripting (XSS) vulnerability in login-with-ajax.php in the Login With Ajax (aka login-with-ajax) plugin before 3.0.4.1 for WordPress allows remote attackers to inject arbitrary web script or HTML via the callback parameter in a lostpassword action to wp-login.php.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.