Filter confidential issues from milestones API if user does not have access

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/15579

1 files changed, 9 insertions, 1 deletions

diff --git a/lib/api/milestones.rb b/lib/api/milestones.rb
index 84b4d4cdd6d..132043cf3f7 100644
--- a/lib/api/milestones.rb
+++ b/lib/api/milestones.rb
@@ -105,7 +105,15 @@ module API
         authorize! :read_milestone, user_project
 
         @milestone = user_project.milestones.find(params[:milestone_id])
-        present paginate(@milestone.issues), with: Entities::Issue, current_user: current_user
+
+        finder_params = {
+          project_id: user_project.id,
+          milestone_title: @milestone.title,
+          state: 'all'
+        }
+
+        issues = IssuesFinder.new(current_user, finder_params).execute
+        present paginate(issues), with: Entities::Issue, current_user: current_user
       end
 
     end