Security issue - Site Studio site migration UCM 10g > 11g

 Hi there - we're not getting much help through Support, so I'm hoping this forum can provide some information.

We are migrating a client's UCM environment - including Site Studio-developed website - from 10g to 11g. The developed site uses a custom login form with form-based authentication using ExtraNetLook.

At the heart of the login form is the following code:

<form name="loginForm" action="/idc/idcplg?cookieLogin=1" method="POST">

 <h5>Login</h5>                  

   <ul id="login">

    <li>

     <label for="login-email">User Name</label>

     <input type="text" value="" class="text" name="username"/>

    </li>

    <li> 

      <label for="login-password">Password</label>

     <input type="password" value="" class="text" name="password"/>