SQL injection vulnerability in article.php in PostNuke 0.62 through 0.64 allows remote attackers to bypass authentication via the user parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/7280
http://www.securityfocus.com/bid/3435
http://www.kb.cert.org/vuls/id/921547
http://archives.neohapsis.com/archives/bugtraq/2001-10/0091.html