02-24-2017
Hi,
Ah, WordPress. So many times I've seen compromised sites and servers that began with an incorrectly-configured, inadequately-secured or out-of-date WordPress install. Seeing 'php-cgi' by itself isn't necessarily sinister. WordPress is PHP based, and so any page you access will certainly spawn a PHP process somehow.
If your server is running Plesk (and from the 'sw-engine-fpm' process in one of your earlier process lists I'm pretty sure it must be), then this is a fairly standard way for Plesk to deal with PHP requests. Any request for a page that needs PHP to handle it will result in a 'php-cgi' process being spawned by Plesk, if it's configured to handle PHP in its usual way.
But I'd definitely start with that WordPress install, in terms of a suspect. At a bare minimum ensure it's up-to-date, that all its plugins are up-to-date (and that they are all legitimate and not malicious or suspicious plugins), that all your WordPress users and admins are ones you actually expect to exist , that they all have good strong passwords set, and so on and so forth. Pay very close attention to anything that allows file uploads in particular. Having anything that allows uploads of any sort without a username and password being required is a disaster waiting to happen, pretty much.
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LEARN ABOUT PHP
php_sapi_name
PHP_SAPI_NAME(3) 1 PHP_SAPI_NAME(3)
php_sapi_name - Returns the type of interface between web server and PHP
SYNOPSIS
string php_sapi_name (void )
DESCRIPTION
Returns a lowercase string that describes the type of interface (the Server API, SAPI) that PHP is using. For example, in CLI PHP this
string will be "cli" whereas with Apache it may have several different values depending on the exact SAPI used. Possible values are listed
below.
RETURN VALUES
Returns the interface type, as a lowercase string.
Although not exhaustive, the possible return values include aolserver, apache, apache2filter, apache2handler, caudium, cgi (until PHP
5.3), cgi-fcgi, cli, cli-server, continuity, embed, fpm-fcgi, isapi, litespeed, milter, nsapi, phttpd, pi3web, roxen, thttpd, tux, and web-
james.
EXAMPLES
Example #1
php_sapi_name(3) example
This example checks for the substring cgi because it may also be cgi-fcgi.
<?php
$sapi_type = php_sapi_name();
if (substr($sapi_type, 0, 3) == 'cgi') {
echo "You are using CGI PHP
";
} else {
echo "You are not using CGI PHP
";
}
?>
NOTES
Note
An alternative approach
The PHP constant PHP_SAPI has the same value as php_sapi_name(3).
Tip
A potential gotcha
The defined SAPI may not be obvious, because for example instead of apache it may be defined as apache2handler or apache2filter.
SEE ALSO
PHP_SAPI.
PHP Documentation Group PHP_SAPI_NAME(3)