Fix contributed projects finder shown private info

app/finders/contributed_projects_finder.rb

@@ -14,6 +14,9 @@ class ContributedProjectsFinder < UnionFinder
   # Returns an ActiveRecord::Relation.
   # rubocop: disable CodeReuse/ActiveRecord
   def execute(current_user = nil)
+    # Do not show contributed projects if the user profile is private.
+    return Project.none unless can_read_profile?(current_user)
+
     segments = all_projects(current_user)
 
     find_union(segments, Project).includes(:namespace).order_id_desc
@@ -22,6 +25,10 @@ class ContributedProjectsFinder < UnionFinder
 
   private
 
+  def can_read_profile?(current_user)
+    Ability.allowed?(current_user, :read_user_profile, @user)
+  end
+
   def all_projects(current_user)
     projects = []
 

changelogs/unreleased/security-contributed-projects.yml

@@ -0,0 +1,5 @@
+---
+title: Fix contributed projects info still visible when user enable private profile
+merge_request:
+author:
+type: security

spec/controllers/users_controller_spec.rb

@@ -206,6 +206,38 @@ describe UsersController do
     end
   end
 
+  describe 'GET #contributed' do
+    let(:project) { create(:project, :public) }
+    let(:current_user) { create(:user) }
+
+    before do
+      sign_in(current_user)
+
+      project.add_developer(public_user)
+      project.add_developer(private_user)
+    end
+
+    context 'with public profile' do
+      it 'renders contributed projects' do
+        create(:push_event, project: project, author: public_user)
+
+        get :contributed, params: { username: public_user.username }
+
+        expect(assigns[:contributed_projects]).not_to be_empty
+      end
+    end
+
+    context 'with private profile' do
+      it 'does not render contributed projects' do
+        create(:push_event, project: project, author: private_user)
+
+        get :contributed, params: { username: private_user.username }
+
+        expect(assigns[:contributed_projects]).to be_empty
+      end
+    end
+  end
+
   describe 'GET #snippets' do
     before do
       sign_in(user)

spec/finders/contributed_projects_finder_spec.rb

@@ -31,4 +31,16 @@ describe ContributedProjectsFinder do
 
     it { is_expected.to match_array([private_project, internal_project, public_project]) }
   end
+
+  context 'user with private profile' do
+    it 'does not return contributed projects' do
+      private_user = create(:user, private_profile: true)
+      public_project.add_maintainer(private_user)
+      create(:push_event, project: public_project, author: private_user)
+
+      projects = described_class.new(private_user).execute(current_user)
+
+      expect(projects).to be_empty
+    end
+  end
 end