Multiple SQL injection vulnerabilities in the (1) update_whosonline_reg and (2) update_whosonline_guest functions in Elite Bulletin Board before 2.1.22 allow remote attackers to execute arbitrary SQL commands via the PATH_INFO to (a) checkuser.php, (b) groups.php, (c) index.php, (d) login.php, (e) quicklogin.php, (f) register.php, (g) Search.php, (h) viewboard.php, or (i) viewtopic.php.