SQL injection vulnerability in the memberslist module in PostNuke 0.726, and possibly earlier, allows remote attackers to execute arbitrary SQL commands via the sortby parameter.

Multiple cross-site scripting (XSS) vulnerabilities in PostNuke 0.726 allows remote attackers to inject arbitrary web script or HTML via the (1) lid and query parameters to the Downloads module, (2) query parameter to the Weblinks module, or (3) hlpfile parameter to openwindow.php.

SQL injection vulnerability in PostNuke 7.2.6 and earlier allows remote attackers to execute arbitrary SQL via (1) the sif parameter to index.php in the Comments module or (2) timezoneoffset parameter to changeinfo.php in the YourAccount module.

PostNuke 0.7.2.6 allows remote attackers to gain information via a direct HTTP request to files in the (1) includes/blocks directory, (2) pnadodb directory, (3) NS-NewUser module, (4) NS-YourAccount, (5) NS-LostPassword module, or (6) NS-User module which reveals the path to the web server in a PHP error message.