A vulnerability has been identified in 1Book, which could be exploited by attackers to compromise a vulnerable web server. This issue is caused by input validation errors in the "guestbook.php" script that does not validate user-supplied parameters (e.g ."message") before being written to the "data.php" file, which could be exploited by remote attackers to inject and execute arbitrary PHP code with the privileges of the web server.
Credits
Vulnerability reported by jiko.
ChangeLog
2008-06-04 : Initial release
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