Multiple cross-site scripting (XSS) vulnerabilities in Tikiwiki (aka Tiki CMS/Groupware) 1.9.x allow remote attackers to inject arbitrary web script or HTML via malformed nested HTML tags such as "<scr<script>ipt>" in (1) offset and (2) days parameters in (a) tiki-lastchanges.php, the (3) find and (4) offset parameters in (b) tiki-orphan_pages.php, the (5) offset and (6) initial parameters in (c) tiki-listpages.php, and (7) an unspecified field in (d) tiki-remind_password.php; and allow remote authenticated users with admin privileges to inject arbitrary web script or HTML via (8) an unspecified field in a metatags action in (e) tiki-admin.php, the (9) offset parameter in (f) tiki-admin_rssmodules.php, the (10) offset and (11) max parameters in (g) tiki-syslog.php, the (12) numrows parameter in (h) tiki-adminusers.php, (13) an unspecified field in (i) tiki-adminusers.php, (14) an unspecified field in (j) tiki-admin_hotwords.php, unspecified fields in (15) "Assign new module" and (16) "Create new user module" in (k) tiki-admin_modules.php, (17) an unspecified field in "Add notification" in (l) tiki-admin_notifications.php, (18) the offset parameter in (m) tiki-admin_notifications.php, the (19) Name and (20) Dsn fields in (o) tiki-admin_dsn.php, the (21) offset parameter in (p) tiki-admin_content_templates.php, (22) an unspecified field in "Create new template" in (q) tiki-admin_content_templates.php, and the (23) offset parameter in (r) tiki-admin_chat.php.