Enforce stricter class filtering in WatchersController (35463).

Patch by Holger Just.

git-svn-id: http://svn.redmine.org/redmine/trunk@21235 e93f8b46-1217-0410-a6f0-8f06a7374b81

diff --git a/app/controllers/watchers_controller.rb b/app/controllers/watchers_controller.rb
index 61681b894eb79aafe9a973f80282689b576bc1e4..79b8095160dd3e7591d57149a926b28caf4bf0c1 100644 (file)
--- a/app/controllers/watchers_controller.rb
+++ b/app/controllers/watchers_controller.rb
@@ -158,7 +158,9 @@ class WatchersController < ApplicationController
       rescue
         nil
       end
-    return unless klass && klass.respond_to?('watched_by')
+    return unless klass && Class === klass # rubocop:disable Style/CaseEquality
+    return unless klass < ActiveRecord::Base
+    return unless klass < Redmine::Acts::Watchable::InstanceMethods
 
     scope = klass.where(:id => Array.wrap(params[:object_id]))
     if klass.reflect_on_association(:project)