SQL injection vulnerability in index.php in the WF-Snippets 1.02 and earlier module for XOOPS allows remote attackers to execute arbitrary SQL commands via the c parameter in a cat action.
https://www.exploit-db.com/exploits/3663
https://exchange.xforce.ibmcloud.com/vulnerabilities/33425
http://www.vupen.com/english/advisories/2007/1263