1 files changed, 1 insertions, 1 deletions
diff --git a/vendor/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/HostBlacklist.php b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/HostBlacklist.php
index a6645c17e..32197c0e6 100644
--- a/vendor/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/HostBlacklist.php
+++ b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/HostBlacklist.php
@@ -35,7 +35,7 @@ class HTMLPurifier_URIFilter_HostBlacklist extends HTMLPurifier_URIFilter
     public function filter(&$uri, $config, $context)
     {
         foreach ($this->blacklist as $blacklisted_host_fragment) {
-            if (strpos($uri->host, $blacklisted_host_fragment) !== false) {
+            if ($uri->host !== null && strpos($uri->host, $blacklisted_host_fragment) !== false) {
                 return false;
             }
         }