Multiple cross-site scripting (XSS) vulnerabilities in PhpBB 2.0.8 allow remote attackers to inject arbitrary web script or HTML via (1) the cat_title parameter in index.php, (2) the faq[0][0] parameter in lang_faq.php as accessible from faq.php, or (3) the faq[0][0] parameter in lang_bbcode.php as accessible from faq.php.