bbsmilies.php and bbcoderef.php in PHP-Nuke 4.4 allows remote attackers to read arbitrary files and gain PHP administrator privileges by inserting a null character and .. (dot dot) sequences into a malformed username argument.
Cross-site request forgery (CSRF) vulnerability in admin.php in Francisco Burzi PHP-Nuke allows remote attackers to add administrative accounts via an AddAuthor action with modified addname and addradminsuper parameters.