Description: BrokeN-ProXy has discovered a vulnerability in Advanced Guestbook, which can be exploited by malicious people to compromise a vulnerable system.
Input passed to the "include_path" parameter in admin.php is not properly verified, before it is used to include files within the "gb_template" class in lib/template.class.php. This can be exploited to include arbitrary files from external and local resources.
The vulnerability is confirmed in version 2.3.1. Other versions may also be affected.
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Ideas, suggestions, and other feedback are most welcome.
