SQL injection vulnerability in the mDigg (com_mdigg) component 2.2.8 for Joomla! allows remote attackers to execute arbitrary SQL commands via the cagtegory parameter in a story_lists action to index.php.
https://www.exploit-db.com/exploits/7574
https://exchange.xforce.ibmcloud.com/vulnerabilities/47612
http://www.securityfocus.com/archive/1/499618/100/0/threaded