diff --git a/www/common/media-tag.js b/www/common/media-tag.js
index a50c22267..99eaa3307 100644
--- a/www/common/media-tag.js
+++ b/www/common/media-tag.js
@@ -575,6 +575,10 @@ var factory = function (Util) {
         Object.keys(origin.attributes).forEach(function (i) {
             if (!/^data-attr/.test(origin.attributes[i].name)) { return; }
             var name = origin.attributes[i].name.slice(10);
+            // Ignore attributes filtered out by the sanitizer
+            if (name === "src") { return; }
+            if (name === "srcdoc") { return; }
+            if (/^on/i.test(name)) { return; }
             var value = origin.attributes[i].value;
             dest.setAttribute(name, value);
         });