diff --git a/app/controllers/exercises_controller.rb b/app/controllers/exercises_controller.rb
index d3d98675..f007f443 100644
--- a/app/controllers/exercises_controller.rb
+++ b/app/controllers/exercises_controller.rb
@@ -120,12 +120,16 @@ class ExercisesController < ApplicationController
   end
 
   def import_uuid_check
+    user = user_for_oauth2_request
+    return render json: {}, status: 401 if user.nil?
+
     uuid = params[:uuid]
     exercise = Exercise.find_by(uuid: uuid)
 
     return render json: {exercise_found: false, message: t('exercises.import_codeharbor.check.no_exercise')} if exercise.nil?
+    return render json: {exercise_found: true, update_right: false, message: t('exercises.import_codeharbor.check.exercise_found_no_right')} unless ExercisePolicy.new(user, exercise).update?
 
-    render json: {exercise_found: true, message: t('exercises.import_codeharbor.check.exercise_found')}
+    render json: {exercise_found: true, update_right: true, message: t('exercises.import_codeharbor.check.exercise_found')}
   end
 
   def import_proforma_xml
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 8f32054a..f67c6c43 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -320,7 +320,8 @@ en:
     import_codeharbor:
       check:
         no_exercise: No corresponding exercise found on Codeocean. Pushing this exercise will create a new one on Codeocean, which will be linked to this one on Codeharbor, any changes to either one can be pushed to the respective other platform.
-        exercise_found: A corresponding exercise has been found on Codeocean. You can either <ul><li>Create a new exercise as a duplicate of this one Codeharbor and push it to Codeocean, using the "Create new" button.</li><li>Overwrite the exercise on Codeocean, by pushing all changes. Only use "Overwrite" for bugfixes or very small changes - it will alter and may break published exercises.</li></ul>
+        exercise_found: A corresponding exercise has been found on Codeocean. You can either <ul><li>Create a new exercise as a duplicate of this one on Codeharbor and push it to Codeocean, using the "Create new" button.</li><li>Overwrite the exercise on Codeocean, by pushing all changes. Only use "Overwrite" for bugfixes or very small changes - it will alter and may break published exercises.</li></ul>
+        exercise_found_no_right: A corresponding exercise has been found on Codeocean, but you don't have the rights to edit it. You can only <ul><li>Create a new exercise as a duplicate of this one on Codeharbor and push it to Codeocean, using the "Create new" button.</li></ul>
     export_codeharbor:
       fail: Failed to push the exercise to CodeHarbor.
       label: Export to Codeharbor