Multiple SQL injection vulnerabilities in index.php in Pixelpost 1-5rc1-2 and earlier allow remote attackers to execute arbitrary SQL commands, and leverage them to gain administrator privileges, via the (1) category or (2) archivedate parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/26922
http://www.securityfocus.com/archive/1/435856/100/0/threaded