SQL injection vulnerability in session.php in DotClear before 1.2.3 allows remote attackers to execute arbitrary SQL commands via the dc_xd parameter in a cookie.
Dotclear before 2.6.2 allows remote attackers to execute arbitrary PHP code via a serialized object in the dc_passwd cookie to a password-protected page, which is not properly handled by (1) inc/public/lib.urlhandlers.php or (2) plugins/pages/_public.php.