Multiple SQL injection vulnerabilities in MyBB (aka MyBulletinBoard) before 1.6.1 allow remote attackers to execute arbitrary SQL commands via the keywords parameter in a (1) do_search action to search.php or (2) do_stuff action to private.php. NOTE: the vendor disputes this issue, saying "Although this doesn't lead to an SQL injection, it does provide a general MyBB SQL error.
http://www.securityfocus.com/bid/45565
http://www.openwall.com/lists/oss-security/2012/05/08/7
http://www.openwall.com/lists/oss-security/2012/05/08/3
http://www.openwall.com/lists/oss-security/2012/03/25/1