Global variable overwrite vulnerability in maincore.php in PHP-Fusion 6.01.4 and earlier uses the extract function on the superglobals, which allows remote attackers to conduct SQL injection attacks via the _SERVER[REMOTE_ADDR] parameter to news.php.
Multiple cross-site scripting (XSS) vulnerabilities in submit.php in PHP-Fusion before 6.01.3 allow remote attackers to inject arbitrary web script or HTML by using edit_profile.php to upload a (1) avatar or (2) forum image attachment that has a .gif or .jpg extension, and begins with a GIF header followed by JavaScript code, which is executed by Internet Explorer.
Cross-site scripting (XSS) vulnerability in PHP-Fusion 6.00.107 and earlier allows remote attackers to inject arbitrary web script or HTML via nested, malformed URL BBCode tags.