Via PHPEverywhere, it looks like there's a pretty big security hole in many different versions of PHP. Bad news. It can be exploited on any PHP script. Here are the details from PHP.net:
"[27-Feb-2002] Due to a security issue found in all versions of PHP (including 3.x and 4.x), a new version of PHP has been released. Details about the security issue are available here. All users of PHP are strongly encouraged to either upgrade to PHP 4.1.2, or install the patch (available for PHP 3.0.18, 4.0.6 and 4.1.0/4.1.1)."
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