diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 9738f29..03e3467 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -1407,6 +1407,9 @@ module ApplicationHelper
   def filter_html(html, source)
     if @plugins
       html = convert_macro(html, source)
+      #TODO This parse should be done through the macro infra, but since there
+      #     are old things that do not support it we are keeping this hot spot.
+      html = @plugins.pipeline(:parse_content, html, source).first
     end
     html
   end
diff --git a/lib/noosfero/plugin.rb b/lib/noosfero/plugin.rb
index 3b51b14..84bbc4f 100644
--- a/lib/noosfero/plugin.rb
+++ b/lib/noosfero/plugin.rb
@@ -252,8 +252,8 @@ class Noosfero::Plugin
 
   # -> Parse and possibly make changes of content (article, block, etc) during HTML rendering
   # returns = content as string after parser and changes
-  def parse_content(args)
-    args
+  def parse_content(html, source)
+    [html, source]
   end
 
   # -> Adds links to the admin panel
diff --git a/lib/noosfero/plugin/manager.rb b/lib/noosfero/plugin/manager.rb
index f82f5d7..d13fab8 100644
--- a/lib/noosfero/plugin/manager.rb
+++ b/lib/noosfero/plugin/manager.rb
@@ -53,6 +53,17 @@ class Noosfero::Plugin::Manager
     result
   end
 
+
+  def pipeline(event, *args)
+    each do |plugin|
+      result = plugin.send(event, *args)
+      result = result.kind_of?(Array) ? result : [result]
+      raise ArgumentError, "Pipeline broken by #{plugin.class.name} on #{event} with #{result.length} arguments instead of #{args.length}." if result.length != args.length
+      args = result
+    end
+    args.length < 2 ? args.first : args
+  end
+
   def parse_macro(macro_name, macro, source = nil)
     macro_instance = enabled_macros[macro_name] || default_macro
     macro_instance.convert(macro, source)
diff --git a/test/unit/plugin_manager_test.rb b/test/unit/plugin_manager_test.rb
index 47e9678..88fc0d5 100644
--- a/test/unit/plugin_manager_test.rb
+++ b/test/unit/plugin_manager_test.rb
@@ -194,4 +194,67 @@ class PluginManagerTest < ActiveSupport::TestCase
     assert_equal 'My name is Macro2!', manager.parse_macro(Plugin1::Macro2.identifier, macro)
   end
 
+  should 'dispatch event in a pipeline sequence' do
+    class Plugin1 < Noosfero::Plugin
+      def transform(v1, v2)
+        v = 2
+        [v1 * v, v2 * v]
+      end
+    end
+
+    class Plugin2 < Noosfero::Plugin
+      def transform(v1, v2)
+        v = 5
+        [v1 * v, v2 * v]
+      end
+    end
+
+    environment.enable_plugin(Plugin1)
+    environment.enable_plugin(Plugin2)
+
+    assert_equal [10, 20], manager.pipeline(:transform, 1, 2)
+  end
+
+  should 'be able to pipeline with single arguments' do
+    class Plugin1 < Noosfero::Plugin
+      def transform(value)
+        value * 2
+      end
+    end
+
+    class Plugin2 < Noosfero::Plugin
+      def transform(value)
+        value * 5
+      end
+    end
+
+    environment.enable_plugin(Plugin1)
+    environment.enable_plugin(Plugin2)
+
+    assert_equal 10, manager.pipeline(:transform, 1)
+  end
+
+  should 'raise if pipeline is broken' do
+    class Plugin1 < Noosfero::Plugin
+      def transform(v1, v2)
+        v = 2
+        [v1 * v, v2 * v]
+      end
+    end
+
+    class Plugin2 < Noosfero::Plugin
+      def transform(v1, v2)
+        v = 5
+        [v1 * v, v2 * v, 666]
+      end
+    end
+
+    environment.enable_plugin(Plugin1)
+    environment.enable_plugin(Plugin2)
+
+    assert_raise ArgumentError do
+      manager.pipeline(:transform, 1, 2)
+    end
+  end
+
 end
--
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