diff --git a/lib/common/collections/wp_items.rb b/lib/common/collections/wp_items.rb
index be09bbf4..78a5dceb 100755
--- a/lib/common/collections/wp_items.rb
+++ b/lib/common/collections/wp_items.rb
@@ -6,4 +6,69 @@ require 'common/collections/wp_items/output'
 class WpItems < Array
   extend WpItems::Detectable
   include WpItems::Output
+
+  attr_accessor :wp_target
+
+  # @param [ WpTarget ] wp_target
+  def initialize(wp_target = nil)
+    self.wp_target = wp_target
+  end
+
+  # @param [String,] argv
+  #
+  # @return [ void ]
+  def add(*args)
+    index = 0
+
+    until args[index].nil?
+      arg = args[index]
+
+      if arg.is_a?(String)
+        if (next_arg = args[index + 1]).is_a?(Hash)
+          item = create_item(arg, next_arg)
+          index += 1
+        else
+          item = create_item(arg)
+        end
+      elsif arg.is_a?(Item)
+        item = arg
+      else
+        raise 'Invalid arguments'
+      end
+
+      self << item
+      index += 1
+    end
+  end
+
+  # @param [ String ] name
+  # @param [ Hash ] attrs
+  #
+  # @return [ WpItem ]
+  def create_item(name, attrs = {})
+    raise 'wp_target must be set' unless wp_target
+
+    item_class.new(
+      wp_target.uri,
+      attrs.merge(
+        name: name,
+        wp_content_dir: wp_target.wp_content_dir,
+        wp_plugins_dir: wp_target.wp_plugins_dir
+      ) { |key, oldval, newval| oldval }
+    )
+  end
+
+  # @param [ WpItems ] other
+  #
+  # @return [ self ]
+  def +(other)
+    other.each { |item| self << item }
+    self
+  end
+
+  protected
+  # @return [ Class ]
+  def item_class
+    Object.const_get(self.class.to_s.gsub(/.$/, ''))
+  end
 end
diff --git a/lib/common/collections/wp_items/detectable.rb b/lib/common/collections/wp_items/detectable.rb
index 832c27fa..ccd82bd5 100755
--- a/lib/common/collections/wp_items/detectable.rb
+++ b/lib/common/collections/wp_items/detectable.rb
@@ -73,11 +73,7 @@ class WpItems < Array
       item_class   = self.item_class
       type         = self.to_s.gsub(/Wp/, '').downcase
       response     = Browser.get(wp_target.url)
-      item_options = {
-        wp_content_dir: wp_target.wp_content_dir,
-        wp_plugins_dir: wp_target.wp_plugins_dir,
-        vulns_file:     self.vulns_file
-      }
+      item_options = self.item_options(wp_target)
 
       regex1 = %r{(?:[^=:]+)\s?(?:=|:)\s?(?:"|')[^"']+\\?/}
       regex2 = %r{\\?/}
@@ -95,6 +91,17 @@ class WpItems < Array
 
     protected
 
+    # @param [ WpTarget ] wp_target
+    #
+    # @return [ Hash ]
+    def item_options(wp_target)
+      {
+        wp_content_dir: wp_target.wp_content_dir,
+        wp_plugins_dir: wp_target.wp_plugins_dir,
+        vulns_file:     self.vulns_file
+      }
+    end
+
     # The default request parameters
     #
     # @return [ Hash ]
@@ -165,7 +172,7 @@ class WpItems < Array
     # @param [ Class ] item_class
     # @param [ String ] vulns_file
     #
-    # @return [ WpItem ]
+    # @return [ Array<WpItem> ]
     def targets_items_from_file(file, wp_target, item_class, vulns_file)
       targets = []
 
diff --git a/lib/common/collections/wp_plugins/detectable.rb b/lib/common/collections/wp_plugins/detectable.rb
index 0573cea5..5c3db5ca 100644
--- a/lib/common/collections/wp_plugins/detectable.rb
+++ b/lib/common/collections/wp_plugins/detectable.rb
@@ -13,5 +13,59 @@ class WpPlugins < WpItems
       '//plugin'
     end
 
+    # @param [ WpTarget ] wp_target
+    # @param [ Hash ] options
+    #
+    # @return [ WpPlugins ]
+    def passive_detection(wp_target, options = {})
+      detected = super(wp_target, options)
+
+      detected += from_header(wp_target)
+      detected += from_content(wp_target)
+
+      detected.uniq! { |i| i.name }
+      detected
+    end
+
+    protected
+
+    # X-Powered-By: W3 Total Cache/0.9.2.5
+    # WP-Super-Cache: Served supercache file from PHP
+    # @param [ WpTarget ] wp_target
+    #
+    # @return [ WpPlugins ]
+    def from_header(wp_target)
+      headers    = Browser.get(wp_target.url).headers
+      wp_plugins = WpPlugins.new(wp_target)
+
+      if headers
+        powered_by     = headers['X-Powered-By']
+        wp_super_cache = headers['wp-super-cache']
+
+        if matches = /W3 Total Cache\/([0-9.]+)/i.match(powered_by)
+          wp_plugins.add('w3-total-cache', version: matches[1])
+        end
+
+        wp_plugins.add('wp-super-cache') if wp_super_cache =~ /supercache/i
+      end
+
+      wp_plugins
+    end
+
+    # <!-- Cached page generated by WP-Super-Cache on 2013-05-03 14:46:37 -->
+    # <!-- Performance optimized by W3 Total Cache.
+    # @param [ WpTarget ] wp_target
+    #
+    # @return [ WpPlugins ]
+    def from_content(wp_target)
+      body       = Browser.get(wp_target.url).body
+      wp_plugins = WpPlugins.new(wp_target)
+
+      wp_plugins.add('wp-super-cache') if body =~ /wp-super-cache/i
+      wp_plugins.add('w3-total-cache') if body =~ /w3 total cache/i
+
+      wp_plugins
+    end
+
   end
 end