diff --git a/common/lib/xmodule/xmodule/assets/split_test/public/js/split_test_staff.js b/common/lib/xmodule/xmodule/assets/split_test/public/js/split_test_staff.js
index 5dc4035b73..16e9c3d2bb 100644
--- a/common/lib/xmodule/xmodule/assets/split_test/public/js/split_test_staff.js
+++ b/common/lib/xmodule/xmodule/assets/split_test/public/js/split_test_staff.js
@@ -13,7 +13,7 @@ window.ABTestSelector = function(runtime, elem) {
             // force this id to remain a string, even if it looks like something else
             var child_group_id = $(this).data('group-id').toString();
             if (child_group_id === group_id) {
-                _this.content_container.html($(this).text());
+                _this.content_container.html(edx.HtmlUtils.HTML($(this).text()).toString());
                 XBlock.initializeBlocks(_this.content_container, $(elem).data('request-token'));
             }
         });
diff --git a/common/static/common/js/discussion/views/new_post_view.js b/common/static/common/js/discussion/views/new_post_view.js
index db9a886de5..cfa603355c 100644
--- a/common/static/common/js/discussion/views/new_post_view.js
+++ b/common/static/common/js/discussion/views/new_post_view.js
@@ -59,8 +59,11 @@
                     startHeader: this.startHeader,
                     form_id: this.mode + (this.topicId ? '-' + this.topicId : '')
                 });
-                this.$el.html(_.template($('#new-post-template').html())(context));
-                threadTypeTemplate = _.template($('#thread-type-template').html());
+                edx.HtmlUtils.setHtml(
+                    this.$el,
+                    edx.HtmlUtils.template($('#new-post-template').html())(context)
+                );
+                threadTypeTemplate = edx.HtmlUtils.template($('#thread-type-template').html());
                 if ($('.js-group-select').prop('disabled')) {
                     $('.group-selector-wrapper').addClass('disabled');
                 }
@@ -77,7 +80,7 @@
                     if (this.course_settings.get('is_discussion_division_enabled')) {
                         this.topicView.on('thread:topic_change', this.updateVisibilityMessage);
                     }
-                    this.addField(this.topicView.render());
+                    this.addField(edx.HtmlUtils.HTML(this.topicView.render()));
                 } else {
                     this.group_name = this.getGroupName();
                     this.updateVisibilityMessage(null, this.is_commentable_divided);
@@ -86,7 +89,10 @@
             };
 
             NewPostView.prototype.addField = function(fieldView) {
-                return this.$('.forum-new-post-form-wrapper').append(fieldView);
+                return edx.HtmlUtils.append(
+                    this.$('.forum-new-post-form-wrapper'),
+                    fieldView
+                );
             };
 
             NewPostView.prototype.isTabMode = function() {
diff --git a/common/static/common/js/discussion/views/response_comment_edit_view.js b/common/static/common/js/discussion/views/response_comment_edit_view.js
index 34cfa4153a..c2cafdfc7e 100644
--- a/common/static/common/js/discussion/views/response_comment_edit_view.js
+++ b/common/static/common/js/discussion/views/response_comment_edit_view.js
@@ -43,8 +43,11 @@
             ResponseCommentEditView.prototype.render = function() {
                 var context = $.extend({mode: this.options.mode, startHeader: this.options.startHeader},
                     this.model.attributes);
-                this.template = _.template($('#response-comment-edit-template').html());
-                this.$el.html(this.template(context));
+                this.template = edx.HtmlUtils.template($('#response-comment-edit-template').html());
+                edx.HtmlUtils.setHtml(
+                    this.$el,
+                    this.template(context)
+                );
                 this.delegateEvents();
                 DiscussionUtil.makeWmdEditor(this.$el, $.proxy(this.$, this), 'edit-comment-body');
                 return this;
diff --git a/common/static/common/js/discussion/views/thread_response_edit_view.js b/common/static/common/js/discussion/views/thread_response_edit_view.js
index 13da03e001..d30e5dcc13 100644
--- a/common/static/common/js/discussion/views/thread_response_edit_view.js
+++ b/common/static/common/js/discussion/views/thread_response_edit_view.js
@@ -43,8 +43,11 @@
             ThreadResponseEditView.prototype.render = function() {
                 var context = $.extend({mode: this.options.mode, startHeader: this.options.startHeader},
                     this.model.attributes);
-                this.template = _.template($('#thread-response-edit-template').html());
-                this.$el.html(this.template(context));
+                this.template = edx.HtmlUtils.template($('#thread-response-edit-template').html());
+                edx.HtmlUtils.setHtml(
+                    this.$el,
+                    this.template(context)
+                );
                 this.delegateEvents();
                 DiscussionUtil.makeWmdEditor(this.$el, $.proxy(this.$, this), 'edit-post-body');
                 return this;
diff --git a/common/templates/admin/student/loginfailures/change_form_template.html b/common/templates/admin/student/loginfailures/change_form_template.html
index ce3b4766c2..73cc3ee9cd 100644
--- a/common/templates/admin/student/loginfailures/change_form_template.html
+++ b/common/templates/admin/student/loginfailures/change_form_template.html
@@ -4,13 +4,13 @@
 <div class="submit-row">
     {% if original.lockout_until %}
     <input type="submit"
-           value="{% trans "Unlock Account" %}"
+           value="{% trans "Unlock Account" as tmsg %}{{tmsg|force_escape}}"
            name="_unlock"
            class="deletelink">
     {% endif %}
     <a href="{% url opts|admin_urlname:'changelist' %}"
        class="closelink">
-        {% trans 'Close' %}
+        {% trans 'Close' as tmsg %}{{tmsg|force_escape}}
     </a>
 </div>
 {% endblock %}
@@ -19,14 +19,14 @@
     {% if original.lockout_until %}
     <p class="deletelink-box">
         <input type="submit"
-               value="{% trans "Unlock Account" %}"
+               value="{% trans "Unlock Account" as tmsg %}{{tmsg|force_escape}}"
                name="_unlock"
                class="deletelink">
     </p>
     {% endif %}
     <a href="{% url opts|admin_urlname:'changelist' %}"
        class="closelink">
-        {% trans 'Close' %}
+        {% trans 'Close' as tmsg %}{{tmsg|force_escape}}
     </a>
 </div>
 {% endblock %}
diff --git a/lms/djangoapps/support/static/support/js/views/enrollment.js b/lms/djangoapps/support/static/support/js/views/enrollment.js
index 205332b612..02e5b17552 100644
--- a/lms/djangoapps/support/static/support/js/views/enrollment.js
+++ b/lms/djangoapps/support/static/support/js/views/enrollment.js
@@ -7,8 +7,9 @@
         'moment',
         'support/js/views/enrollment_modal',
         'support/js/collections/enrollment',
-        'text!support/templates/enrollment.underscore'
-    ], function(Backbone, _, moment, EnrollmentModal, EnrollmentCollection, enrollmentTemplate) {
+        'text!support/templates/enrollment.underscore',
+        'edx-ui-toolkit/js/utils/html-utils'
+    ], function(Backbone, _, moment, EnrollmentModal, EnrollmentCollection, enrollmentTemplate, HtmlUtils) {
         return Backbone.View.extend({
 
             ENROLLMENT_CHANGE_REASONS: {
@@ -35,14 +36,16 @@
 
             render: function() {
                 var user = this.enrollments.user;
-                this.$el.html(_.template(enrollmentTemplate)({
-                    user: user,
-                    enrollments: this.enrollments,
-                    formatDate: function(date) {
-                        return date ? moment.utc(date).format('lll z') : 'N/A';
-                    }
-                }));
-
+                HtmlUtils.setHtml(
+                    this.$el,
+                    HtmlUtils.template(enrollmentTemplate)({
+                        user: user,
+                        enrollments: this.enrollments,
+                        formatDate: function(date) {
+                            return date ? moment.utc(date).format('lll z') : 'N/A';
+                        }
+                    })
+                );
                 this.checkInitialSearch();
                 return this;
             },
diff --git a/lms/static/js/certificates/views/certificate_whitelist_editor.js b/lms/static/js/certificates/views/certificate_whitelist_editor.js
index 24ca758919..fcd226f320 100644
--- a/lms/static/js/certificates/views/certificate_whitelist_editor.js
+++ b/lms/static/js/certificates/views/certificate_whitelist_editor.js
@@ -8,9 +8,10 @@
         'underscore',
         'gettext',
         'backbone',
-        'js/certificates/models/certificate_exception'
+        'js/certificates/models/certificate_exception',
+        'edx-ui-toolkit/js/utils/html-utils'
     ],
-        function($, _, gettext, Backbone, CertificateExceptionModel) {
+        function($, _, gettext, Backbone, CertificateExceptionModel, HtmlUtils) {
             return Backbone.View.extend({
                 el: '#certificate-white-list-editor',
                 message_div: '.message',
@@ -21,7 +22,7 @@
 
                 render: function() {
                     var template = this.loadTemplate('certificate-white-list-editor');
-                    this.$el.html(template());
+                    this.$el.html(HtmlUtils.HTML(template()).toString());
                 },
 
                 loadTemplate: function(name) {
@@ -59,12 +60,12 @@
                     var message = '';
 
                     if (this.collection.findWhere(model)) {
-                        message = gettext('<%= user %> already in exception list.');
+                        message = gettext('<%- user %> already in exception list.');
                         this.escapeAndShowMessage(
                             _.template(message)({user: (user_name || user_email)})
                         );
                     } else if (certificate_exception.isValid()) {
-                        message = gettext('<%= user %> has been successfully added to the exception list. Click Generate Exception Certificate below to send the certificate.');  // eslint-disable-line max-len
+                        message = gettext('<%- user %> has been successfully added to the exception list. Click Generate Exception Certificate below to send the certificate.');  // eslint-disable-line max-len
                         certificate_exception.save(
                             null,
                             {
@@ -88,7 +89,8 @@
 
                 escapeAndShowMessage: function(message) {
                     $(this.message_div + '>p').remove();
-                    this.$(this.message_div).removeClass('hidden').append('<p>' + _.escape(message) + '</p>');
+                    // eslint-disable-next-line max-len
+                    this.$(this.message_div).removeClass('hidden').append(HtmlUtils.joinHtml(HtmlUtils.HTML('<p>'), message, HtmlUtils.HTML('</p>')).toString());
                 },
 
                 showSuccess: function(caller, add_model, message) {
diff --git a/lms/static/js/edxnotes/views/shim.js b/lms/static/js/edxnotes/views/shim.js
index 942731af9c..453247039d 100644
--- a/lms/static/js/edxnotes/views/shim.js
+++ b/lms/static/js/edxnotes/views/shim.js
@@ -1,8 +1,8 @@
 (function(define, undefined) {
     'use strict';
     define([
-        'jquery', 'underscore', 'annotator_1.2.9', 'js/edxnotes/utils/utils'
-    ], function($, _, Annotator, Utils) {
+        'jquery', 'underscore', 'annotator_1.2.9', 'js/edxnotes/utils/utils', 'edx-ui-toolkit/js/utils/html-utils'
+    ], function($, _, Annotator, Utils, HtmlUtils) {
         var _t = Annotator._t;
 
     /**
@@ -48,9 +48,15 @@
             // It depends on the number of annotatable components on the page.
             var tagsField = $('li.annotator-item >input', this.annotator.editor.element).attr('id');
             if ($("label.sr[for='" + tagsField + "']", this.annotator.editor.element).length === 0) {
-                $('<label class="sr" for=' + tagsField + '>' + _t('Tags (space-separated)') + '</label>').insertBefore(
-                    $('#' + tagsField, this.annotator.editor.element)
-                );
+                HtmlUtils.prepend(
+                  $('#' + tagsField, this.annotator.editor.element),
+                  $(HtmlUtils.joinHtml(
+                    HtmlUtils.HTML('<label class="sr" for='),
+                    tagsField,
+                    HtmlUtils.HTML('>'),
+                    _t('Tags (space-separated)'),
+                    HtmlUtils.HTML('</label>')
+                  )));
             }
             return this;
         },
@@ -159,14 +165,15 @@
             .addField({
                 load: function(field, annotation) {
                     if (annotation.text) {
-                        $(field).html(Utils.nl2br(Annotator.Util.escape(annotation.text)));
+                        $(field).html(HtmlUtils.HTML(Utils.nl2br(annotation.text)).toString());
                     } else {
-                        $(field).html('<i>' + _t('No Comment') + '</i>');
+                        // eslint-disable-next-line max-len
+                        $(field).html(HtmlUtils.joinHtml(HtmlUtils.HTML('<i>'), _t('No Comment'), HtmlUtils.HTML('</i>')).toString());
                     }
                     return self.publish('annotationViewerTextField', [field, annotation]);
                 }
             })
-            .element.appendTo(this.wrapper).bind({
+            .element.appendTo(this.wrapper).bind({ // xss-lint: disable=javascript-jquery-insert-into-target
                 mouseover: this.clearViewerHideTimer,
                 mouseout: this.startViewerHideTimer
             });
@@ -210,9 +217,15 @@
             // It depends on the number of annotatable components on the page.
             var noteField = $('li.annotator-item >textarea', this.element).attr('id');
             if ($("label.sr[for='" + noteField + "']", this.element).length === 0) {
-                $('<label class="sr" for=' + noteField + '>' + _t('Note') + '</label>').insertBefore(
-                    $('#' + noteField, this.element)
-                );
+                HtmlUtils.prepend(
+                    $('#' + noteField, this.element),
+                    $(HtmlUtils.joinHtml(
+                      HtmlUtils.HTML('<label class="sr" for='),
+                      noteField,
+                      HtmlUtils.HTML('>'),
+                      _t('Note'),
+                      HtmlUtils.HTML('</label>')
+                    )));
             }
 
             if (event.type === 'keydown') {
@@ -234,6 +247,7 @@
      * Modifies Annotator.onHighlightMouseover to avoid showing the viewer if the
      * editor is opened.
      **/
+        // xss-lint: disable=javascript-jquery-insertion
         Annotator.prototype.onHighlightMouseover = _.wrap(
         Annotator.prototype.onHighlightMouseover,
         function(func, event) {
diff --git a/lms/static/js/edxnotes/views/tabs/search_results.js b/lms/static/js/edxnotes/views/tabs/search_results.js
index b680047c79..b08fc55931 100644
--- a/lms/static/js/edxnotes/views/tabs/search_results.js
+++ b/lms/static/js/edxnotes/views/tabs/search_results.js
@@ -2,8 +2,8 @@
     'use strict';
     define([
         'jquery', 'underscore', 'gettext', 'js/edxnotes/views/tab_panel', 'js/edxnotes/views/tab_view',
-        'js/edxnotes/views/search_box'
-    ], function($, _, gettext, TabPanelView, TabView, SearchBoxView) {
+        'js/edxnotes/views/search_box', 'edx-ui-toolkit/js/utils/html-utils', 'edx-ui-toolkit/js/utils/string-utils'
+    ], function($, _, gettext, TabPanelView, TabView, SearchBoxView, HtmlUtils, StringUtils) {
         var view = 'Search Results';
         var SearchResultsView = TabView.extend({
             PanelConstructor: TabPanelView.extend({
@@ -16,7 +16,7 @@
                     ].join(' ');
                 },
                 renderContent: function() {
-                    this.$el.append(this.getNotes(this.collection.toArray()));
+                    this.$el.append(HtmlUtils.HTML(this.getNotes(this.collection.toArray())).toString());
                     return this;
                 }
             }),
@@ -31,10 +31,10 @@
                     ].join(' ');
                 },
                 renderContent: function() {
-                    var message = gettext('No results found for "%(query_string)s". Please try searching again.');
+                    var message = gettext('No results found for "{query_string}". Please try searching again.');
 
                     this.$el.append($('<p />', {
-                        text: interpolate(message, {
+                        text: StringUtils.interpolate(message, {
                             query_string: this.options.searchQuery
                         }, true)
                     }));
diff --git a/lms/static/js/financial-assistance/views/financial_assistance_form_view.js b/lms/static/js/financial-assistance/views/financial_assistance_form_view.js
index 444b3cc24a..bcd80d508e 100644
--- a/lms/static/js/financial-assistance/views/financial_assistance_form_view.js
+++ b/lms/static/js/financial-assistance/views/financial_assistance_form_view.js
@@ -10,6 +10,7 @@
         'text!../../../templates/financial-assistance/financial_assessment_form.underscore',
         'text!../../../templates/financial-assistance/financial_assessment_submitted.underscore',
         'text!templates/student_account/form_field.underscore',
+        'edx-ui-toolkit/js/utils/html-utils',
         'string_utils'
     ],
          function(
@@ -21,7 +22,8 @@
              FormView,
              formViewTpl,
              successTpl,
-             formFieldTpl
+             formFieldTpl,
+             HtmlUtils
          ) {
              return FormView.extend({
                  el: '.financial-assistance-wrapper',
@@ -74,7 +76,7 @@
                          fields: html || ''
                      });
 
-                     this.$el.html(_.template(this.tpl)(data));
+                     HtmlUtils.setHtml(this.$el, HtmlUtils.template(this.tpl)(data));
 
                      this.postRender();
                      this.validateCountry();
@@ -83,7 +85,7 @@
                  },
 
                  renderSuccess: function() {
-                     this.$el.html(_.template(this.successTpl)({
+                     HtmlUtils.setHtml(this.$el, HtmlUtils.template(this.successTpl)({
                          course: this.model.get('course'),
                          dashboard_url: this.context.dashboard_url
                      }));
@@ -103,7 +105,9 @@
                          msg = gettext('An error has occurred. Check your Internet connection and try again.');
                      }
 
-                     this.errors = ['<li>' + msg + '</li>'];
+                     this.errors = [HtmlUtils.joinHtml(
+                        HtmlUtils.HTML('<li>'), msg, HtmlUtils.HTML('</li>')
+                     ).toString()];
                      this.renderErrors(this.defaultFormErrorsTitle, this.errors);
                      this.toggleDisableButton(false);
                  },
@@ -122,14 +126,22 @@
                             // Translators: link_start and link_end denote the html to link back to the profile page.
                             gettext(txt.join('')),
                              {
-                                 link_start: '<a href="' + this.context.account_settings_url + '">',
+                                 link_start: HtmlUtils.joinHtml(
+                                    HtmlUtils.HTML('<a href="'),
+                                    this.context.account_settings_url,
+                                    HtmlUtils.HTML('">')
+                                 ).toString(),
                                  link_end: '</a>'
                              }
                         );
 
                      if (!this.model.get('country')) {
                          $countryLabel.addClass('error');
-                         this.renderErrors(this.defaultFormErrorsTitle, ['<li>' + msg + '</li>']);
+                         this.renderErrors(this.defaultFormErrorsTitle, [HtmlUtils.joinHtml(
+                            HtmlUtils.HTML('<li>'),
+                            msg,
+                            HtmlUtils.HTML('</li>')
+                         ).toString()]);
                          this.toggleDisableButton(true);
                      }
                  },
diff --git a/lms/static/js/groups/views/cohort_editor.js b/lms/static/js/groups/views/cohort_editor.js
index 33a0c15b51..feb4513281 100644
--- a/lms/static/js/groups/views/cohort_editor.js
+++ b/lms/static/js/groups/views/cohort_editor.js
@@ -1,9 +1,9 @@
 /* globals _, NotificationModel, NotificationView, interpolate_text */
 (function(define) {
     'use strict';
-    define(['backbone', 'underscore', 'jquery', 'gettext', 'js/groups/views/cohort_form', 'string_utils',
-        'js/models/notification', 'js/views/notification'],
-        function(Backbone, _, $, gettext, CohortFormView) {
+    define(['backbone', 'underscore', 'jquery', 'gettext', 'js/groups/views/cohort_form',
+        'edx-ui-toolkit/js/utils/html-utils', 'string_utils', 'js/models/notification', 'js/views/notification'],
+        function(Backbone, _, $, gettext, CohortFormView, HtmlUtils) {
             var CohortEditorView = Backbone.View.extend({
 
                 events: {
@@ -14,8 +14,8 @@
                 },
 
                 initialize: function(options) {
-                    this.template = _.template($('#cohort-editor-tpl').text());
-                    this.groupHeaderTemplate = _.template($('#cohort-group-header-tpl').text());
+                    this.template = HtmlUtils.template($('#cohort-editor-tpl').text());
+                    this.groupHeaderTemplate = HtmlUtils.template($('#cohort-group-header-tpl').text());
                     this.cohorts = options.cohorts;
                     this.contentGroups = options.contentGroups;
                     this.context = options.context;
@@ -29,7 +29,7 @@
                 preassignedNotifications: null,
 
                 render: function() {
-                    this.$el.html(this.template({
+                    HtmlUtils.setHtml(this.$el, this.template({
                         cohort: this.model
                     }));
                     this.renderGroupHeader();
@@ -44,7 +44,7 @@
                 },
 
                 renderGroupHeader: function() {
-                    this.$('.cohort-management-group-header').html(this.groupHeaderTemplate({
+                    HtmlUtils.setHtml(this.$('.cohort-management-group-header'), this.groupHeaderTemplate({
                         cohort: this.model
                     }));
                 },