phazizGuestbook v2.0=0D
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Homepage:=0D
http://www.devhome.de/#english_version=0D 
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Effected files:=0D
input boxes of name, email, url, text.=0D
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XSS Vulnerability:=0D
None of these input boxes sanatize user input before generating it. for PoC put  in any of the above boxes. =0D