PHP remote file inclusion vulnerability in livre_include.php in @lex Guestbook allows remote attackers to execute arbitrary PHP code by modifying the chem_absolu parameter to reference a URL on a remote web server that contains the code.
https://exchange.xforce.ibmcloud.com/vulnerabilities/17516
https://euvd.enisa.europa.eu/vulnerability/EUVD-2004-1548
http://www.securityfocus.com/bid/11260
http://securitytracker.com/id?1011432