SQL injection vulnerability in wbsearch.aspx in uniForum 4 and earlier allows remote attackers to execute arbitrary SQL commands via the "by User" field (aka the TXbyuser parameter).
https://www.exploit-db.com/exploits/3106
https://exchange.xforce.ibmcloud.com/vulnerabilities/31362
http://www.securityfocus.com/bid/21966
http://www.securityfocus.com/archive/1/458060/100/0/threaded