diff --git a/static/js/map/overlays/BorderOverlay.js b/static/js/map/overlays/BorderOverlay.js
index 1f5139e..189862e 100644
--- a/static/js/map/overlays/BorderOverlay.js
+++ b/static/js/map/overlays/BorderOverlay.js
@@ -1,4 +1,5 @@
 import AbstractGeoJsonOverlay from './AbstractGeoJsonOverlay.js';
+import { HtmlSanitizer } from '../../lib/HtmlSanitizer.js';
 
 export default AbstractGeoJsonOverlay.extend({
   initialize: function() {
@@ -80,7 +81,7 @@ export default AbstractGeoJsonOverlay.extend({
         "properties":{
             "name": bordername,
             "color": borderColors[bordername],
-            "popupContent": "<b>Border (" + bordername + ")</b>"
+            "popupContent": "<b>Border (" + HtmlSanitizer.SanitizeHtml(bordername) + ")</b>"
         }
       };
 
diff --git a/static/js/map/overlays/LabelOverlay.js b/static/js/map/overlays/LabelOverlay.js
index ce1075e..3e8515f 100644
--- a/static/js/map/overlays/LabelOverlay.js
+++ b/static/js/map/overlays/LabelOverlay.js
@@ -1,4 +1,5 @@
 import AbstractIconOverlay from './AbstractIconOverlay.js';
+import { HtmlSanitizer } from '../../lib/HtmlSanitizer.js';
 
 export default AbstractIconOverlay.extend({
   initialize: function() {
@@ -27,7 +28,7 @@ export default AbstractIconOverlay.extend({
           fill='${lbl.attributes.color}'
           dominant-baseline="central"
           transform="rotate(${lbl.attributes.direction}, 100, 100)">
-          ${lbl.attributes.text}
+          ${HtmlSanitizer.SanitizeHtml(lbl.attributes.text)}
         </text>
       </svg>
     `;