SquirrelMail Virtual Keyboard 0.9.1 Cross Site Scripting

Hi, Squirrelmail plugin 'Virtual Keyboard' version 0.9.1 and lower is vulnerable to cross site scripting XSS. The vkeyboard.php script fails to sanitize the value of HTTP GET parameter 'passformname' which the script stores in a variable of the same name and outputs unmodified into a HTML documen...