Cross-site scripting (XSS) vulnerability in the YourAccount module for PHP-Nuke 5.0 through 6.0 allows remote attackers to inject arbitrary web script or HTML via the useravatar parameter.

PHP-Nuke 7.3, and other products that use the PHP-Nuke codebase such as the Nuke Cops betaNC PHP-Nuke Bundle, OSCNukeLite 3.1, and OSC2Nuke 7x do not properly use the eregi() PHP function with $SERVER['PHPSELF'] to identify the calling script, which allows remote attackers to directly access scripts, obtain path information via a PHP error message, and possibly gain access, as demonstrated using an HTTP request that contains the "admin.php" string.

SQL injection vulnerability in the bblogin function in functions.php in PHP-Nuke 6.x through 7.2 allows remote attackers to bypass authentication and gain access by injecting base64-encoded SQL code into the user parameter.

SQL injection vulnerability in PHP-Nuke 6.9 and earlier, and possibly 7.x, allows remote attackers to inject arbitrary SQL code and gain sensitive information via (1) the category variable in the Search module or (2) the admin variable in the WebLinks module.

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.