Multiple cross-site scripting (XSS) vulnerabilities in NOCC Webmail 1.0 allow remote attackers to inject arbitrary web script or HTML via (1) the html_error_occurred parameter in error.php, (2) html_filter_select parameter in filter_prefs.php, (3) html_no_mail parameter in no_mail.php, the (4) page_line, (5) prev, and (6) next parameters in html_bottom_table.php, and the (7) _SESSION['nocc_theme'] parameter in footer.php.