diff --git a/Changelog.md b/Changelog.md
index ff4b828e1..aa83e297f 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -92,6 +92,9 @@
 * ffi 1.1.5 -> 1.3.1
 * configurate 0.0.1 -> 0.0.2
 
+# 0.0.2.4
+
+* Fix XSS vulnerabilities caused by not escaping a users name fields when loading it from JSON. [#3948](https://github.com/diaspora/diaspora/issues/3948)
 
 # 0.0.2.3
 
diff --git a/app/assets/javascripts/widgets/search.js b/app/assets/javascripts/widgets/search.js
index 4648cdf45..675b6f8b8 100644
--- a/app/assets/javascripts/widgets/search.js
+++ b/app/assets/javascripts/widgets/search.js
@@ -36,11 +36,12 @@
     };
 
     this.formatResult = function(row) {
-      return row.name;
+      return Handlebars.Utils.escapeExpression(row.name);
     };
 
     this.parse = function(data) {
       var results =  data.map(function(person){
+        person['name'] = Handlebars.Utils.escapeExpression(person['name']);
         return {data : person, value : person['name']}
       });
 
diff --git a/app/helpers/layout_helper.rb b/app/helpers/layout_helper.rb
index c226aff74..d29b1243e 100644
--- a/app/helpers/layout_helper.rb
+++ b/app/helpers/layout_helper.rb
@@ -43,7 +43,7 @@ module LayoutHelper
     user = UserPresenter.new(current_user, a_ids).to_json
     content_tag(:script) do
       <<-JS.html_safe
-        window.current_user_attributes = #{user}
+        window.current_user_attributes = #{j user}
       JS
     end
   end
diff --git a/app/views/people/show.html.haml b/app/views/people/show.html.haml
index 9dd05ad6a..a2b18ca21 100644
--- a/app/views/people/show.html.haml
+++ b/app/views/people/show.html.haml
@@ -7,7 +7,7 @@
   = javascript_include_tag :people
   - if user_signed_in? && @person != current_user.person
     :javascript
-      Mentions.options.prefillMention = Mentions._contactToMention(#{@person.to_json});
+      Mentions.options.prefillMention = Mentions._contactToMention(#{j @person.to_json});
 
 - content_for :page_title do
   = @person.name
diff --git a/config/initializers/json_escape.rb b/config/initializers/json_escape.rb
new file mode 100644
index 000000000..a27bf2dd5
--- /dev/null
+++ b/config/initializers/json_escape.rb
@@ -0,0 +1,11 @@
+# From http://jfire.io/blog/2012/04/30/how-to-securely-bootstrap-json-in-a-rails-view/
+# Review on Rails 4 update, might be built in by then!
+
+class ActionView::Base
+  def json_escape(s)
+    result = s.to_s.gsub('/', '\/')
+    s.html_safe? ? result.html_safe : result
+  end
+
+  alias j json_escape
+end
diff --git a/spec/controllers/people_controller_spec.rb b/spec/controllers/people_controller_spec.rb
index 222509082..c38ed5148 100644
--- a/spec/controllers/people_controller_spec.rb
+++ b/spec/controllers/people_controller_spec.rb
@@ -201,11 +201,10 @@ describe PeopleController do
     it 'does not allow xss attacks' do
       user2 = bob
       profile = user2.profile
-      profile.first_name = "<script> alert('xss attack');</script>"
-      profile.save
+      profile.update_attribute(:first_name, "</script><script> alert('xss attack');</script>")
       get :show, :id => user2.person.to_param
       response.should be_success
-      response.body.match(profile.first_name).should be_false
+      response.body.should_not include(profile.first_name)
     end
 
 
diff --git a/spec/helpers/layout_helper_spec.rb b/spec/helpers/layout_helper_spec.rb
index f63da634a..dd11e3666 100644
--- a/spec/helpers/layout_helper_spec.rb
+++ b/spec/helpers/layout_helper_spec.rb
@@ -5,6 +5,18 @@
 require 'spec_helper'
 
 describe LayoutHelper do
+  describe "#set_current_user_in_javascript" do
+    it "doesn't allow xss" do
+      user = FactoryGirl.create :user
+      profile = user.profile
+      profile.update_attribute(:first_name, "</script><script>alert(0);</script>");
+      stub!(:user_signed_in?).and_return true
+      stub!(:current_user).and_return user
+      set_current_user_in_javascript.should_not be_empty
+      set_current_user_in_javascript.should_not include(profile.first_name)
+    end
+  end
+
   describe "#page_title" do
     context "passed blank text" do
       it "returns Diaspora*" do
diff --git a/spec/javascripts/widgets/search-spec.js b/spec/javascripts/widgets/search-spec.js
new file mode 100644
index 000000000..0e06516c2
--- /dev/null
+++ b/spec/javascripts/widgets/search-spec.js
@@ -0,0 +1,12 @@
+describe("Diaspora.Widgets.Search", function() {
+    describe("parse", function() {
+        it("escapes a persons name", function() {
+            $("#jasmine_content").html('<form action="#" id="searchForm"></form>');
+
+            var search = Diaspora.BaseWidget.instantiate("Search", $("#jasmine_content > #searchForm"));
+            var person = {"name": "</script><script>alert('xss');</script"};
+            result = search.parse([$.extend({}, person)]);
+            expect(result[0].data.name).toNotEqual(person.name);
+        });
+    });
+});