From 8cfcf1c9f55479cdf581a28e505a6b5d027e373c Mon Sep 17 00:00:00 2001
From: El RIDO <elrido@gmx.net>
Date: Sun, 18 Sep 2016 11:29:37 +0200
Subject: [PATCH] Adding HTTP headers to address certain XSS attacks, resolves
 #91

---
 lib/PrivateBin.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/PrivateBin.php b/lib/PrivateBin.php
index 9b41682b..68985e60 100644
--- a/lib/PrivateBin.php
+++ b/lib/PrivateBin.php
@@ -403,12 +403,15 @@ class PrivateBin
     {
         // set headers to disable caching
         $time = gmdate('D, d M Y H:i:s \G\M\T');
-        header('Cache-Control: no-store, no-cache, must-revalidate');
+        header('Cache-Control: no-store, no-cache, no-transform, must-revalidate');
         header('Pragma: no-cache');
         header('Expires: ' . $time);
         header('Last-Modified: ' . $time);
         header('Vary: Accept');
         header('Content-Security-Policy: ' . $this->_conf->getKey('cspheader'));
+        header('X-Xss-Protection: 1; mode=block');
+        header('X-Frame-Options: DENY');
+        header('X-Content-Type-Options: nosniff');
 
         // label all the expiration options
         $expire = array();