diff --git a/modules/monitoring/library/Monitoring/Web/Helper/PluginOutputPurifier.php b/modules/monitoring/library/Monitoring/Web/Helper/PluginOutputPurifier.php
new file mode 100644
index 000000000..9382c9eea
--- /dev/null
+++ b/modules/monitoring/library/Monitoring/Web/Helper/PluginOutputPurifier.php
@@ -0,0 +1,17 @@
+<?php
+/* Icinga Web 2 | (c) 2018 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Module\Monitoring\Web\Helper;
+
+use Icinga\Web\Helper\HtmlPurifier;
+
+class PluginOutputPurifier extends HtmlPurifier
+{
+    protected function configure($config)
+    {
+        $config->set(
+            'HTML.Allowed',
+            'p,br,b,a[href|target],i,ul,ol,li,table,tr,th[colspan],td[colspan],div,*[class]'
+        );
+    }
+}