SQL injection vulnerability in PHP-Nuke 5.6 and 6.0 allows remote attackers to execute arbitrary SQL commands via the days parameter to the search module.
https://exchange.xforce.ibmcloud.com/vulnerabilities/11375
https://euvd.enisa.europa.eu/vulnerability/EUVD-2003-1425
http://www.securityfocus.com/bid/6887
http://archives.neohapsis.com/archives/bugtraq/2003-02/0246.html