Multiple SQL injection vulnerabilities in the Search module in PHP-Nuke 7.8, and possibly other versions before 7.9 with patch 3.1, allows remote attackers to execute arbitrary SQL commands, as demonstrated via the query parameter in a stories type.

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 (HTTPUSERAGENT), which allows remote attackers to bypass CAPTCHA controls by fixing the User Agent, performing a valid challenge/response, then replaying that pair in the randomnum and gfxcheck parameters.

SQL injection vulnerability in modules/journal/search.php in the Journal module in Francisco Burzi PHP-Nuke 7.9 and earlier allows remote attackers to execute arbitrary SQL commands via the forwhat parameter.

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

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.

Interpretation conflict in includes/mainfile.php in PHP-Nuke 7.9 and later allows remote attackers to perform cross-site scripting (XSS) attacks by replacing the ">" in the tag with a "<", which bypasses the regular expressions that sanitize the data, but is automatically corrected by many web browsers. NOTE: it could be argued that this vulnerability is due to a design limitation of many web browsers; if so, then this should not be treated as a vulnerability in PHP-Nuke.

Cross-site scripting (XSS) vulnerability in header.php in PHP-Nuke 6.0 to 7.8 allows remote attackers to inject arbitrary web script or HTML via the pagetitle parameter.