diff --git a/app/helpers/events_helper.rb b/app/helpers/events_helper.rb
index cb6f709c604..269acf5b2e2 100644
--- a/app/helpers/events_helper.rb
+++ b/app/helpers/events_helper.rb
@@ -110,10 +110,12 @@ module EventsHelper
                                    event.note_target)
     elsif event.note?
       if event.note_target
-        event_note_target_path(event)
+        event_note_target_url(event)
       end
     elsif event.push?
       push_event_feed_url(event)
+    elsif event.created_project?
+      project_url(event.project)
     end
   end
 
@@ -145,14 +147,14 @@ module EventsHelper
     end
   end
 
-  def event_note_target_path(event)
+  def event_note_target_url(event)
     if event.commit_note?
-      project_commit_path(event.project, event.note_target, anchor: dom_id(event.target))
+      project_commit_url(event.project, event.note_target, anchor: dom_id(event.target))
     elsif event.project_snippet_note?
-      project_snippet_path(event.project, event.note_target, anchor: dom_id(event.target))
+      project_snippet_url(event.project, event.note_target, anchor: dom_id(event.target))
     else
-      polymorphic_path([event.project.namespace.becomes(Namespace),
-                        event.project, event.note_target],
+      polymorphic_url([event.project.namespace.becomes(Namespace),
+                       event.project, event.note_target],
                         anchor: dom_id(event.target))
     end
   end
@@ -166,7 +168,7 @@ module EventsHelper
           event.note_target_reference
         end
 
-      link_to(text, event_note_target_path(event), title: event.target_title, class: 'has-tooltip')
+      link_to(text, event_note_target_url(event), title: event.target_title, class: 'has-tooltip')
     else
       content_tag(:strong, '(deleted)')
     end
diff --git a/app/views/events/_event_push.atom.haml b/app/views/events/_event_push.atom.haml
index bc1d32607e4..c5b033b1185 100644
--- a/app/views/events/_event_push.atom.haml
+++ b/app/views/events/_event_push.atom.haml
@@ -1,7 +1,7 @@
 %div{ xmlns: "http://www.w3.org/1999/xhtml" }
   %p
     %strong= event.author_name
-    = link_to "(#{truncate_sha(event.commit_id)})", project_commit_path(event.project, event.commit_id)
+    = link_to "(#{truncate_sha(event.commit_id)})", event_feed_url(event)
     %i
       at
       = event.created_at.to_s(:short)
diff --git a/app/views/users/calendar_activities.html.haml b/app/views/users/calendar_activities.html.haml
index 6b1d75c6e72..2d4656e8608 100644
--- a/app/views/users/calendar_activities.html.haml
+++ b/app/views/users/calendar_activities.html.haml
@@ -18,7 +18,7 @@
           = event_action_name(event)
           %strong
             - if event.note?
-              = link_to event.note_target.to_reference, event_note_target_path(event), class: 'has-tooltip', title: event.target_title
+              = link_to event.note_target.to_reference, event_note_target_url(event), class: 'has-tooltip', title: event.target_title
             - elsif event.target
               = link_to event.target.to_reference, [event.project.namespace.becomes(Namespace), event.project, event.target], class: 'has-tooltip', title: event.target_title
 
diff --git a/changelogs/unreleased/50823-not-properly-filled-in-activity-RSS-feed-yml.yml b/changelogs/unreleased/50823-not-properly-filled-in-activity-RSS-feed-yml.yml
new file mode 100644
index 00000000000..924e8867701
--- /dev/null
+++ b/changelogs/unreleased/50823-not-properly-filled-in-activity-RSS-feed-yml.yml
@@ -0,0 +1,5 @@
+---
+title: Fix links in RSS feed elements
+merge_request: 21424
+author: Marc Schwede
+type: fixed
diff --git a/spec/helpers/events_helper_spec.rb b/spec/helpers/events_helper_spec.rb
index fccde8b7eba..466e018d68c 100644
--- a/spec/helpers/events_helper_spec.rb
+++ b/spec/helpers/events_helper_spec.rb
@@ -25,4 +25,47 @@ describe EventsHelper do
       expect(helper.event_commit_title("foo & bar")).to eq("foo & bar")
     end
   end
+
+  describe '#event_feed_url' do
+    let(:event) { create(:event) }
+    let(:project) { create(:project, :public, :repository) }
+
+    it "returns project issue url" do
+      event.target = create(:issue)
+
+      expect(helper.event_feed_url(event)).to eq(project_issue_url(event.project, event.issue))
+    end
+
+    it "returns project merge_request url" do
+      event.target = create(:merge_request)
+
+      expect(helper.event_feed_url(event)).to eq(project_merge_request_url(event.project, event.merge_request))
+    end
+
+    it "returns project commit url" do
+      event.target = create(:note_on_commit, project: project)
+
+      expect(helper.event_feed_url(event)).to eq(project_commit_url(event.project, event.note_target))
+    end
+
+    it "returns event note target url" do
+      event.target = create(:note)
+
+      expect(helper.event_feed_url(event)).to eq(event_note_target_url(event))
+    end
+
+    it "returns project url" do
+      event.project = project
+      event.action = 1
+
+      expect(helper.event_feed_url(event)).to eq(project_url(event.project))
+    end
+
+    it "returns push event feed url" do
+      event = create(:push_event)
+      create(:push_event_payload, event: event, action: :pushed)
+
+      expect(helper.event_feed_url(event)).to eq(push_event_feed_url(event))
+    end
+  end
 end