Direct code injection vulnerability in FlatNuke 2.5.3 allows remote attackers to execute arbitrary PHP code by placing the code into the Referer header of an HTTP request, which causes the code to be injected into referer.php, which can then be accessed by the attacker.

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FlatNuke 2.5.3 allows remote attackers to cause a denial of service or obtain sensitive information via (1) a direct request to foot_news.php, which triggers an infinite loop, or (2) direct requests to unknown scripts, which reveals the web document root in an error message.

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index.php in FlatNuke 2.5.1 allows remote attackers to create an administrator account via carriage returns and #10 in the url_avatar field, which is interpreted as a sensitive directive.

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Direct code injection vulnerability in FlatNuke 2.5.1 allows remote attackers to execute arbitrary PHP code by placing the code into the url_avatar field.