FireStats plugin for WordPress versions before 1.6.2-stable
Send malicious PHP code via fs_javascript URL parameter to firestats-wordpress.php file
Update FireStats plugin to version 1.6.2-stable or later; alternatively deactivate and remove the plugin
If the file path is returned, check WordPress admin panel for FireStats version - if below 1.6.2-stable, system is vulnerable to RCE
test -f /var/www/html/wp-content/plugins/firestats/firestats-wordpress.php && echo 'Found' || find / -name 'firestats-wordpress.php' -type f 2>/dev/null | head -1
AV:N/AC:L/Au:N/C:P/I:P/A:P