diff --git a/lib/models/user.js b/lib/models/user.js
index 383be1a72..d79530039 100644
--- a/lib/models/user.js
+++ b/lib/models/user.js
@@ -2,6 +2,7 @@
 // external modules
 const Sequelize = require('sequelize')
 const scrypt = require('scrypt-kdf')
+const filterXSS = require('xss')
 
 // core
 const logger = require('../logger')
@@ -74,7 +75,7 @@ module.exports = function (sequelize, DataTypes) {
     }
     if (profile) {
       profile = {
-        name: profile.displayName || profile.username,
+        name: filterXSS(profile.displayName || profile.username),
         photo: User.parsePhotoByProfile(profile),
         biggerphoto: User.parsePhotoByProfile(profile, true)
       }
@@ -135,7 +136,7 @@ module.exports = function (sequelize, DataTypes) {
         photo = generateAvatarURL(profile.username)
         break
     }
-    return photo
+    return filterXSS(photo)
   }
   User.parseProfileByEmail = function (email) {
     return {
diff --git a/public/views/hedgedoc/head.ejs b/public/views/hedgedoc/head.ejs
index 446687953..419d5dcc7 100644
--- a/public/views/hedgedoc/head.ejs
+++ b/public/views/hedgedoc/head.ejs
@@ -7,7 +7,7 @@
 <%- include('../includes/favicon') %>
 <% for (var og in opengraph) { %>
 <% if (opengraph.hasOwnProperty(og) && opengraph[og].trim() !== '') { %>
-<meta property="og:<%- og %>" content="<%- opengraph[og] %>">
+<meta property="og:<%= og %>" content="<%= opengraph[og] %>">
 <% }} if (!opengraph.hasOwnProperty('image')) { %>
 <meta property="og:image" content="<%- serverURL %>/icons/android-chrome-512x512.png">
 <meta property="og:image:alt" content="HedgeDoc logo">