Secunia

luny has discovered some vulnerabilities in Sport Slo Advanced Guestbook, which can be exploited by malicious people to conduct script insertion attacks.

Input passed to the "name" and "form" form field parameters in guestbook.php is not properly sanitised before being used. This can be exploited to insert arbitrary HTML and script code, which will be executed in a user's browser session in context of an affected site when the malicious entry is viewed.

Solution
Edit the source code to ensure that input is properly sanitised.

Provided and/or discovered by
luny

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