diff --git a/core/Controller/TwoFactorChallengeController.php b/core/Controller/TwoFactorChallengeController.php
index 9f379ad30d..9c22da8ae0 100644
--- a/core/Controller/TwoFactorChallengeController.php
+++ b/core/Controller/TwoFactorChallengeController.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * @copyright Copyright (c) 2016, ownCloud, Inc.
  *
@@ -29,6 +30,7 @@ use OC_Util;
 use OCP\AppFramework\Controller;
 use OCP\AppFramework\Http\RedirectResponse;
 use OCP\AppFramework\Http\TemplateResponse;
+use OCP\Authentication\TwoFactorAuth\IProvidesCustomCSP;
 use OCP\Authentication\TwoFactorAuth\TwoFactorException;
 use OCP\IRequest;
 use OCP\ISession;
@@ -135,7 +137,11 @@ class TwoFactorChallengeController extends Controller {
 			'redirect_url' => $redirect_url,
 			'template' => $tmpl->fetchPage(),
 		];
-		return new TemplateResponse($this->appName, 'twofactorshowchallenge', $data, 'guest');
+		$response = new TemplateResponse($this->appName, 'twofactorshowchallenge', $data, 'guest');
+		if ($provider instanceof IProvidesCustomCSP) {
+			$response->setContentSecurityPolicy($provider->getCSP());
+		}
+		return $response;
 	}
 
 	/**
diff --git a/lib/composer/composer/autoload_classmap.php b/lib/composer/composer/autoload_classmap.php
index e99f7efd57..4cef6a6538 100644
--- a/lib/composer/composer/autoload_classmap.php
+++ b/lib/composer/composer/autoload_classmap.php
@@ -60,6 +60,7 @@ return array(
     'OCP\\Authentication\\LoginCredentials\\ICredentials' => $baseDir . '/lib/public/Authentication/LoginCredentials/ICredentials.php',
     'OCP\\Authentication\\LoginCredentials\\IStore' => $baseDir . '/lib/public/Authentication/LoginCredentials/IStore.php',
     'OCP\\Authentication\\TwoFactorAuth\\IProvider' => $baseDir . '/lib/public/Authentication/TwoFactorAuth/IProvider.php',
+    'OCP\\Authentication\\TwoFactorAuth\\IProvidesCustomCSP' => $baseDir . '/lib/public/Authentication/TwoFactorAuth/IProvidesCustomCSP.php',
     'OCP\\Authentication\\TwoFactorAuth\\TwoFactorException' => $baseDir . '/lib/public/Authentication/TwoFactorAuth/TwoFactorException.php',
     'OCP\\AutoloadNotAllowedException' => $baseDir . '/lib/public/AutoloadNotAllowedException.php',
     'OCP\\BackgroundJob' => $baseDir . '/lib/public/BackgroundJob.php',
diff --git a/lib/composer/composer/autoload_static.php b/lib/composer/composer/autoload_static.php
index 92260f83cb..50ab55365b 100644
--- a/lib/composer/composer/autoload_static.php
+++ b/lib/composer/composer/autoload_static.php
@@ -90,6 +90,7 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
         'OCP\\Authentication\\LoginCredentials\\ICredentials' => __DIR__ . '/../../..' . '/lib/public/Authentication/LoginCredentials/ICredentials.php',
         'OCP\\Authentication\\LoginCredentials\\IStore' => __DIR__ . '/../../..' . '/lib/public/Authentication/LoginCredentials/IStore.php',
         'OCP\\Authentication\\TwoFactorAuth\\IProvider' => __DIR__ . '/../../..' . '/lib/public/Authentication/TwoFactorAuth/IProvider.php',
+        'OCP\\Authentication\\TwoFactorAuth\\IProvidesCustomCSP' => __DIR__ . '/../../..' . '/lib/public/Authentication/TwoFactorAuth/IProvidesCustomCSP.php',
         'OCP\\Authentication\\TwoFactorAuth\\TwoFactorException' => __DIR__ . '/../../..' . '/lib/public/Authentication/TwoFactorAuth/TwoFactorException.php',
         'OCP\\AutoloadNotAllowedException' => __DIR__ . '/../../..' . '/lib/public/AutoloadNotAllowedException.php',
         'OCP\\BackgroundJob' => __DIR__ . '/../../..' . '/lib/public/BackgroundJob.php',
diff --git a/lib/public/Authentication/TwoFactorAuth/IProvidesCustomCSP.php b/lib/public/Authentication/TwoFactorAuth/IProvidesCustomCSP.php
new file mode 100644
index 0000000000..2c1dc001c1
--- /dev/null
+++ b/lib/public/Authentication/TwoFactorAuth/IProvidesCustomCSP.php
@@ -0,0 +1,38 @@
+<?php
+
+/**
+ * @author Christoph Wurst <christoph@winzerhof-wurst.at>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCP\Authentication\TwoFactorAuth;
+
+use OCP\AppFramework\Http\ContentSecurityPolicy;
+
+/**
+ * @since 13.0.0
+ */
+interface IProvidesCustomCSP {
+
+	/**
+	 * @return ContentSecurityPolicy
+	 *
+	 * @since 13.0.0
+	 */
+	public function getCSP();
+}