Multiple cross-site scripting (XSS) vulnerabilities in MySource 2.14.0 allow remote attackers to inject arbitrary web script or HTML via (1) the target_url parameter in upgrade_in_progress_backend.php, (2) the stylesheet parameter in edit_table_cell_type_wysiwyg.php, and the bgcolor parameter in (3) insert_table.php, (4) edit_table_cell_props.php, (5) header.php, (6) edit_table_row_props.php, and (7) edit_table_props.php.