PHP-Nuke is prone to multiple vulnerabilities. The issues result from insufficient sanitization of user-supplied data. The following specific issues can affect the application:
PHP-Nuke is prone to multiple cross-site scripting vulnerabilities. These issues affect the 'Faq', 'Encyclopedia' and 'Reviews' modules.
These cross-site scripting issues could permit a remote attacker to create a malicious URI link that includes hostile HTML and script code. If a user follows the malicious link, the attacker-supplied code executes in the Web browser of the victim computer.
PHP-Nuke is prone to an SQL Injection Vulnerability. Again the issue is due to a failure of the application to properly sanitize user-supplied input. The problem presents itself when SQL syntax is passed through the a parameter of the 'Reviews' module.
As a result of this issue an attacker could modify the logic and structure of database queries.
Finally a remote denial of service vulnerability is reported to exist in the score subsystem of the 'Review' module of PHP-Nuke, it is reported that a large number supplied as a value for a parameter passed to the 'Reviews' module will deny service to legitimate PHP-Nuke users.
PHP-Nuke contains a flaw that may allow a remote denial of service. The issue is triggered when an attacker submits a very long score which is not validated by the Score subsystem, and will result in loss of availability for the platform.
Currently, there are no known upgrades, patches, or workarounds available to correct this issue.