SQL injection vulnerability in the Downloads module for unknown versions of PostNuke allows remote attackers to execute arbitrary SQL commands via the lid parameter in a viewdownloaddetails operation. NOTE: this issue might have been in the viewdownloaddetails function in dl-downloaddetails.php, but PostNuke 0.764 does not appear to have this issue.

Interpretation conflict in PostNuke 0.761 and earlier allows remote attackers to conduct cross-site scripting (XSS) attacks via HTML tags with a trailing "<" character, which is interpreted as a ">" character by some web browsers but bypasses the blacklist protection in (1) the pnVarCleanFromInput function in pnAPI.php, (2) the pnSecureInput function in pnAntiCracker.php, and (3) the htmltext parameter in an edituser operation to user.php.

Multiple cross-site scripting (XSS) vulnerabilities in PostNuke 0.760-RC4b allows remote attackers to inject arbitrary web script or HTML via (1) the moderate parameter to the Comments module or (2) htmltext parameter to html/user.php.

SQL injection vulnerability in the Downloads module in PostNuke 0.760-RC4b allows PostNuke administrators to execute arbitrary SQL commands via the show parameter to dl-viewdownload.php.