Multiple cross-site scripting (XSS) vulnerabilities in jax_guestbook.php in Jax Guestbook 3.1 and 3.31 allow remote attackers to inject arbitrary web script or HTML via the (1) gmt_ofs and (2) language parameters.  NOTE: the page parameter is already covered by CVE-2006-1913.  NOTE: it was later reported that 3.50 is also affected.