wp-trackback.php in WordPress 2.0.6 and earlier does not properly unset variables when the input data includes a numeric parameter with a value matching an alphanumeric parameter's hash value, which allows remote attackers to execute arbitrary SQL commands via the tb_id parameter. NOTE: it could be argued that this vulnerability is due to a bug in the unset PHP command (CVE-2006-3017) and the proper fix should be in PHP; if so, then this should not be treated as a vulnerability in WordPress.

Cross-site scripting (XSS) vulnerability in wp-admin/templates.php in WordPress 2.0.5 allows remote attackers to inject arbitrary web script or HTML via the file parameter. NOTE: some sources have reported this as a vulnerability in the get_file_description function in wp-admin/admin-functions.php.

Cross-site scripting (XSS) vulnerability in the paging links functionality in template-functions-links.php in Wordpress 1.5.2, and possibly other versions before 2.0.1, allows remote attackers to inject arbitrary web script or HTML to Internet Explorer users via the request URI ($_SERVER['REQUEST_URI']).

Multiple "unannounced" cross-site scripting (XSS) vulnerabilities in WordPress before 2.0.2 allow remote attackers to inject arbitrary web script or HTML via unknown attack vectors.