SQL injection vulnerability in admin.php in the administration backend in Francisco Burzi PHP-Nuke 8.0 and earlier allows remote attackers to execute arbitrary SQL commands via the chng_uid parameter.

Multiple cross-site request forgery (CSRF) vulnerabilities in mainfile.php in Francisco Burzi PHP-Nuke 8.0 and earlier allow remote attackers to hijack the authentication of administrators for requests that (1) add user accounts or (2) grant the administrative privilege to a user account, related to a Referer check that uses a substring comparison.

Multiple cross-site scripting (XSS) vulnerabilities in Francisco Burzi PHP-Nuke 8.0 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) sender_name or (2) sender_email parameter in a Feedback action to modules.php.

Multiple cross-site scripting (XSS) vulnerabilities in the Search Module in PHP-Nuke allow remote attackers to inject arbitrary web script or HTML via a trailing "<" instead of a ">" in (1) the onerror attribute of an IMG element, (2) the onload attribute of an IFRAME element, or (3) redirect users to other sites via the META tag.

The cross-site request forgery (CSRF) protection in PHP-Nuke 8.0 and earlier does not ensure the SERVER superglobal is an array before validating the HTTP_REFERER, which allows remote attackers to conduct CSRF attacks.

Directory traversal vulnerability in mainfile.php in PHP-Nuke 8.0 and earlier allows remote attackers to read arbitrary files via a .. (dot dot) in the lang parameter.

SQL injection vulnerability in mainfile.php in PHP-Nuke 8.0 and earlier allows remote attackers to execute arbitrary SQL commands in the Top or News module via the lang parameter.

Multiple SQL injection vulnerabilities in Francisco Burzi PHP-Nuke 7.9 allow remote attackers to execute arbitrary SQL commands via (1) the active parameter in admin/modules/modules.php; the (2) ad_class, (3) imageurl, (4) clickurl, (5) ad_code, or (6) position parameter in modules/Advertising/admin/index.php; or unspecified vectors in the (7) advertising, (8) weblinks, or (9) reviews section.

Multiple SQL injection vulnerabilities in the (1) rate_article and (2) rate_complete functions in modules/News/index.php in the News module in Francisco Burzi PHP-Nuke 7.9 and earlier, when magic_quotes_gpc is disabled, allow remote attackers to execute arbitrary SQL commands via the sid parameter.

The CAPTCHA functionality in php-Nuke 6.0 through 7.9 uses fixed challenge/response pairs that only vary once per day based on the User Agent (HTTP_USER_AGENT), which allows remote attackers to bypass CAPTCHA controls by fixing the User Agent, performing a valid challenge/response, then replaying that pair in the random_num and gfx_check parameters.