From e2f60597df488cf073d14913d8a523cbb447f733 Mon Sep 17 00:00:00 2001
From: jim-p <jimp@netgate.com>
Date: Wed, 19 Sep 2018 13:52:09 -0400
Subject: [PATCH] Fix redirect back to user mgmt when editing user 0. Fixes
 #8920

---
 src/usr/local/www/system_certmanager.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/usr/local/www/system_certmanager.php b/src/usr/local/www/system_certmanager.php
index 4ee49182d8..c67e65c0ed 100644
--- a/src/usr/local/www/system_certmanager.php
+++ b/src/usr/local/www/system_certmanager.php
@@ -525,7 +525,7 @@ if ($_POST['save']) {
 				write_config();
 			}
 
-			if ($userid && !$input_errors) {
+			if ((isset($userid) && is_numeric($userid)) && !$input_errors) {
 				post_redirect("system_usermanager.php", array('act' => 'edit', 'userid' => $userid));
 				exit;
 			}