Flippy My Life Stories 2.0 XSS Vulnerability

Flippy My Life Stories 2.0 is a CMS allowing to create a everyday story website. Usage Info 1: Go to http://website.fr/register.html 2: In "nickname" type Javascript code like alert2 3: Go to http://website.fr/userlogin.html and Log in 4: Click on "My Stories", it will lead you on the vulnerable...