diff --git a/backend/app/serializers.py b/backend/app/serializers.py
index a748fcbe..e4c36594 100644
--- a/backend/app/serializers.py
+++ b/backend/app/serializers.py
@@ -188,12 +188,11 @@ def to_representation(self, instance):
         total_score = representation.pop('total_score')
         representation['average_score'] = total_score / instance.times_taken if instance.times_taken > 0 else 0
 
-        # Transform tags to a list of names
         representation['tags'] = [tag['name'] for tag in representation['tags']]
         representation['author'] = { 'id' : instance.author.id, 'username' : instance.author.username } 
 
         request = self.context.get('request')
-        if request and request.user.is_authenticated:
+        if request and request.user and request.user.is_authenticated:
             representation['is_bookmarked'] = instance.bookmarked_by.filter(id=request.user.id).exists()
             representation['is_liked'] = instance.liked_by.filter(id=request.user.id).exists()
 
diff --git a/backend/app/views_directory/quiz_views.py b/backend/app/views_directory/quiz_views.py
index 57e4154e..634d8be5 100644
--- a/backend/app/views_directory/quiz_views.py
+++ b/backend/app/views_directory/quiz_views.py
@@ -40,7 +40,6 @@ def create_quiz(request):
     return Response(quizSerializer.data, status=status.HTTP_201_CREATED)
 
 @api_view(['GET'])
-@permission_classes([IsAuthenticated])
 def view_quizzes(request):
     quizzes = Quiz.objects.all()
     # TODO: paginate the results
@@ -226,13 +225,13 @@ def get_question(request):
 
 
 @api_view(['GET'])
-@permission_classes([IsAuthenticated])
 def get_quiz(request, quiz_id):
     quiz = get_object_or_404(Quiz, id=quiz_id)
     serializer = QuizSerializer(quiz, context = {'request': request})
     data = {'quiz': serializer.data}
-    data['is_solved'] = QuizProgress.objects.filter(quiz=quiz, user=request.user, completed=True).exists()
-    data['quiz_result_id'] = QuizResults.objects.filter(quiz=quiz, user=request.user).order_by('-id').first().id if data['is_solved'] else None
+    if request.user.is_authenticated:    
+        data['is_solved'] = QuizProgress.objects.filter(quiz=quiz, user=request.user, completed=True).exists()
+        data['quiz_result_id'] = QuizResults.objects.filter(quiz=quiz, user=request.user).order_by('-id').first().id if data['is_solved'] else None
     return Response(data, status=status.HTTP_200_OK)