Multiple cross-site scripting (XSS) vulnerabilities in OpenBiblio 0.5.2-pre4 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) LAST and (2) FIRST parameters to admin/staff_del_confirm.php, (3) the name parameter to admin/theme_del_confirm.php, or (4) the themeName parameter to admin/theme_preview.php.