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well it has the potential for cross site scripting but putting

 

 

 

{url}www.{url=www.s=''style='top:expression(eval(this.sss));'sss=`alert('weeeepopup');this.sss=null`s='}{/url}{/url}'

 

(copy and paste, then replace curly brackets with square ones)

 

 

into a post, when it is viewed a message box saying "weeeepopup" will appear (or whatever you want it to say) this only works when the viewer is using internet explorer, if viewed from firefox, everything from top:expression is viewed as text, so the tag can be used to hide it

 

example: http://briggsy.org/bbb/viewtopic.php?t=2

  greeneyes said:
needs more square brackets....

i found it after it was posted here. i was gonna make my own, but someone beat me to it i guess. :gaysex:

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