SQL injection vulnerability in index.php in @lex Guestbook 4.0.2 and earlier, when magic_quotes_gpc is disabled, allows remote attackers to execute arbitrary SQL commands via the lang parameter.
acid-root.new.fr/poc/20070107.txt
osvdb.org/31707
secunia.com/advisories/23637
securityreason.com/securityalert/2135
www.securityfocus.com/archive/1/456218/100/0/threaded
www.securityfocus.com/bid/21926
www.vupen.com/english/advisories/2007/0137
exchange.xforce.ibmcloud.com/vulnerabilities/31393
www.exploit-db.com/exploits/3103