diff --git a/app/controllers/community_solutions_controller.rb b/app/controllers/community_solutions_controller.rb
index c6d95254..827c9557 100644
--- a/app/controllers/community_solutions_controller.rb
+++ b/app/controllers/community_solutions_controller.rb
@@ -5,6 +5,7 @@ class CommunitySolutionsController < ApplicationController
   include RedirectBehavior
   include SubmissionParameters
 
+  before_action :require_user!
   before_action :set_community_solution, only: %i[edit update]
   before_action :set_community_solution_lock, only: %i[edit]
   before_action :set_exercise_and_submission, only: %i[edit update]