diff --git a/db_central_columns.php b/db_central_columns.php
index 0f92d3ab0c..6eebb40a0a 100644
--- a/db_central_columns.php
+++ b/db_central_columns.php
@@ -84,9 +84,9 @@ $pmadb = $cfgCentralColumns['db'];
 $pmatable = $cfgCentralColumns['table'];
 $max_rows = intval($GLOBALS['cfg']['MaxRows']);
 
-if (isset($_REQUEST['edit_central_columns_page'])) {
-    $selected_fld = $_REQUEST['selected_fld'];
-    $selected_db = $_REQUEST['db'];
+if (isset($_POST['edit_central_columns_page'])) {
+    $selected_fld = $_POST['selected_fld'];
+    $selected_db = $_POST['db'];
     $edit_central_column_page = $centralColumns->getHtmlForEditingPage(
         $selected_fld,
         $selected_db
@@ -109,15 +109,15 @@ if (isset($_POST['delete_save'])) {
         false
     );
 }
-if (!empty($_REQUEST['total_rows'])
-    && Core::isValid($_REQUEST['total_rows'], 'integer')
+if (!empty($_POST['total_rows'])
+    && Core::isValid($_POST['total_rows'], 'integer')
 ) {
-    $total_rows = $_REQUEST['total_rows'];
+    $total_rows = $_POST['total_rows'];
 } else {
     $total_rows = $centralColumns->getCount($db);
 }
-if (Core::isValid($_REQUEST['pos'], 'integer')) {
-    $pos = intval($_REQUEST['pos']);
+if (Core::isValid($_POST['pos'], 'integer')) {
+    $pos = intval($_POST['pos']);
 } else {
     $pos = 0;
 }
diff --git a/js/db_central_columns.js b/js/db_central_columns.js
index 88b0ce78ac..f6e4477913 100644
--- a/js/db_central_columns.js
+++ b/js/db_central_columns.js
@@ -65,10 +65,10 @@ AJAX.registerOnload('db_central_columns.js', function () {
             return false;
         }
         var argsep = PMA_commonParams.get('arg_separator');
-        var editColumnData = editColumnList + '' + argsep + 'edit_central_columns_page=true' + argsep + 'ajax_request=true' + argsep + 'ajax_page_request=true' + argsep + 'db=' + PMA_commonParams.get('db');
+        var editColumnData = editColumnList + '' + argsep + 'edit_central_columns_page=true' + argsep + 'ajax_request=true' + argsep + 'ajax_page_request=true' + argsep + 'db=' + encodeURIComponent(PMA_commonParams.get('db'));
         PMA_ajaxShowMessage();
         AJAX.source = $(this);
-        $.get('db_central_columns.php', editColumnData, AJAX.responseHandler);
+        $.post('db_central_columns.php', editColumnData, AJAX.responseHandler);
     });
     $('#multi_edit_central_columns').submit(function (event) {
         event.preventDefault();
diff --git a/libraries/classes/CentralColumns.php b/libraries/classes/CentralColumns.php
index 555195c95d..7379cee484 100644
--- a/libraries/classes/CentralColumns.php
+++ b/libraries/classes/CentralColumns.php
@@ -299,7 +299,7 @@ class CentralColumns
         if (empty($cfgCentralColumns)) {
             return $this->configErrorMessage();
         }
-        $db = $_REQUEST['db'];
+        $db = $_POST['db'];
         $pmadb = $cfgCentralColumns['db'];
         $central_list_table = $cfgCentralColumns['table'];
         $this->dbi->selectDb($db);
@@ -333,7 +333,7 @@ class CentralColumns
             }
         } else {
             if ($table === null) {
-                $table = $_REQUEST['table'];
+                $table = $_POST['table'];
             }
             foreach ($field_select as $column) {
                 $cols .= "'" . $this->dbi->escapeString($column) . "',";
@@ -406,7 +406,7 @@ class CentralColumns
         if (empty($cfgCentralColumns)) {
             return $this->configErrorMessage();
         }
-        $db = $_REQUEST['db'];
+        $db = $_POST['db'];
         $pmadb = $cfgCentralColumns['db'];
         $central_list_table = $cfgCentralColumns['table'];
         $this->dbi->selectDb($db);
diff --git a/test/classes/CentralColumnsTest.php b/test/classes/CentralColumnsTest.php
index 8640c2cd11..9294ea5c9c 100644
--- a/test/classes/CentralColumnsTest.php
+++ b/test/classes/CentralColumnsTest.php
@@ -227,8 +227,8 @@ class CentralColumnsTest extends TestCase
      */
     public function testSyncUniqueColumns()
     {
-        $_REQUEST['db'] = 'PMA_db';
-        $_REQUEST['table'] = 'PMA_table';
+        $_POST['db'] = 'PMA_db';
+        $_POST['table'] = 'PMA_table';
 
         $this->assertTrue(
             $this->centralColumns->syncUniqueColumns(
@@ -244,8 +244,8 @@ class CentralColumnsTest extends TestCase
      */
     public function testDeleteColumnsFromList()
     {
-        $_REQUEST['db'] = 'PMA_db';
-        $_REQUEST['table'] = 'PMA_table';
+        $_POST['db'] = 'PMA_db';
+        $_POST['table'] = 'PMA_table';
 
         // when column exists in the central column list
         $GLOBALS['dbi']->expects($this->at(4))