Tweak comment

config/global.ini.php

@@ -539,8 +539,9 @@ enable_load_data_infile = 1
 ; - links to Uninstall themes will be disabled (but user can still enable/disable themes)
 enable_plugins_admin = 1
 
-; By setting this option to 1, it will be possible to upload plugin archives directly in Piwik
-; Enabling this opens a remote code execution vulnarability, which yould be used by attackers gaining access to Piwik admin
+; By setting this option to 1, it will be possible for Super Users to upload Piwik plugin ZIP archives directly in Piwik Administration.
+; Enabling this opens a remote code execution vulnerability where
+; an attacker who gained Super User access could execute custom PHP code in a Piwik plugin.
 enable_plugin_upload = 0
 
 ; By setting this option to 0, you can prevent Super User from editing the Geolocation settings.

core/CronArchive.php

@@ -1017,7 +1017,7 @@ class CronArchive
     private function checkResponse($response, $url)
     {
         if (empty($response)
-            || stripos($response, 'error')
+            || stripos($response, 'error') !== false
         ) {
             return $this->logNetworkError($url, $response);
         }