misc.php for vBulletin 3.0.6 and earlier, when "Add Template Name in HTML Comments" is enabled, allows remote attackers to execute arbitrary PHP code via nested variables in the template parameter.
SQL injection vulnerability in (1) ttlast.php and (2) last10.php in vBulletin 3.0.x allows remote attackers to execute arbitrary SQL statements via the fsel parameter, as demonstrated using last.php.