Multiple SQL injection vulnerabilities in MyBB 1.2.10 and earlier allow remote moderators and administrators to execute arbitrary SQL commands via (1) the mergepost parameter in a do_mergeposts action, (2) rid parameter in an allreports action, or (3) threads parameter in a do_multimovethreads action to (a) moderation.php; or (4) gid parameter to (b) admin/usergroups.php.
https://exchange.xforce.ibmcloud.com/vulnerabilities/39729
https://exchange.xforce.ibmcloud.com/vulnerabilities/39728
http://www.securityfocus.com/archive/1/486433/100/0/threaded
http://securityreason.com/securityalert/3558