SQL injection vulnerability in index.php in the RWCards (com_rwcards) 2.4.3 and earlier component for Joomla! allows remote attackers to execute arbitrary SQL commands via the category_id parameter.
https://www.exploit-db.com/exploits/3565
https://exchange.xforce.ibmcloud.com/vulnerabilities/33194
http://www.vupen.com/english/advisories/2007/1105