SQL injection vulnerability in index.php in the Downloads (com_downloads) component for Mambo and Joomla! allows remote attackers to execute arbitrary SQL commands via the cat parameter in a selectcat function, a different vector than CVE-2008-0652.
https://exchange.xforce.ibmcloud.com/vulnerabilities/40621
http://www.securityfocus.com/archive/1/488291/100/0/threaded