Multiple cross-site scripting (XSS) vulnerabilities in realGuestbook 5.01, when register_globals is enabled, allow remote attackers to inject arbitrary web script or HTML via the (1) bg_color_1, (2) fs_menu, (3) fc_menu, (4) ff_menu, (5) bg_color_2, (6) fs_normal, (7) fc_normal, and (8) ff_normal parameters to welcome_admin.php; and possibly unspecified other parameters and files.  NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.