Multiple SQL injection vulnerabilities in Phorum before 5.1.22 allow remote attackers to execute arbitrary SQL commands via (1) a modified recipients parameter name in (a) pm.php; (2) the curr parameter to the (b) badwords (aka censorlist) or (c) banlist module in admin.php; or (3) the "Edit groups / Add group" field in the (d) groups module in admin.php.
https://exchange.xforce.ibmcloud.com/vulnerabilities/34081
http://www.vupen.com/english/advisories/2007/1479
http://www.securityfocus.com/archive/1/466286/100/0/threaded
http://www.phorum.org/story.php?76
http://securityreason.com/securityalert/2617