From 32e6a5ef38f692f455d2d2fc77d6216a6f11dede Mon Sep 17 00:00:00 2001
From: jmontoyaa <gugli100@gmail.com>
Date: Mon, 27 Mar 2017 13:49:35 +0200
Subject: [PATCH] Fix double link creation see BT#12235

---
 main/link/link.php | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/main/link/link.php b/main/link/link.php
index c44a6ad527..83a759782e 100755
--- a/main/link/link.php
+++ b/main/link/link.php
@@ -99,14 +99,16 @@ $show = isset($_REQUEST['show']) && in_array(trim($_REQUEST['show']), ['all', 'n
 $categoryId = isset($_REQUEST['category_id']) ? intval($_REQUEST['category_id']) : '';
 $linkListUrl = api_get_self().'?'.api_get_cidreq().'&category_id='.$categoryId.'&show='.$show;
 $content = '';
+$token = Security::get_existing_token();
 
 switch ($action) {
     case 'addlink':
         if (api_is_allowed_to_edit(null, true)) {
-            $form = Link::getLinkForm(null, 'addlink');
-            if ($form->validate()) {
+            $form = Link::getLinkForm(null, 'addlink', $token);
+            if ($form->validate() && Security::check_token('get')) {
                 // Here we add a link
                 Link::addlinkcategory("link");
+                Security::clear_token();
                 header('Location: '.$linkListUrl);
                 exit;
             }