diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index c5c246a9be180142508a1845391a29c7a78a3fcf..cc72f067ef284b2eb18f7ce52dac96a3e2ac454d 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,6 +1,7 @@
 
-Drupal 6.23-dev, xxxx-xx-xx (development release)
+Drupal 6.23, 2012-02-01
 ----------------------
+- Fixed security issues (Cross site scripting), see SA-CORE-2012-001.
 
 Drupal 6.22, 2011-05-25
 ----------------------
diff --git a/includes/common.inc b/includes/common.inc
index 3d737847017d0093607294b3f1df235cf879592d..dfd6c4f4130daa048876a4869c84d4b5d29a57c1 100644
--- a/includes/common.inc
+++ b/includes/common.inc
@@ -630,7 +630,7 @@ function drupal_error_handler($errno, $message, $filename, $line, $context) {
     return;
   }
 
-  if ($errno & (E_ALL ^ E_DEPRECATED)) {
+  if ($errno & (E_ALL ^ E_DEPRECATED ^ E_NOTICE)) {
     $types = array(1 => 'error', 2 => 'warning', 4 => 'parse error', 8 => 'notice', 16 => 'core error', 32 => 'core warning', 64 => 'compile error', 128 => 'compile warning', 256 => 'user error', 512 => 'user warning', 1024 => 'user notice', 2048 => 'strict warning', 4096 => 'recoverable fatal error');
 
     // For database errors, we want the line number/file name of the place that
diff --git a/modules/aggregator/aggregator.admin.inc b/modules/aggregator/aggregator.admin.inc
index 221d0ab2e4ea9505e0867d443d75c9ee6d1ab7f4..ca879f9474961cc7dcd485cca101ff89ffab1dd4 100644
--- a/modules/aggregator/aggregator.admin.inc
+++ b/modules/aggregator/aggregator.admin.inc
@@ -26,7 +26,15 @@ function aggregator_view() {
   $header = array(t('Title'), t('Items'), t('Last update'), t('Next update'), array('data' => t('Operations'), 'colspan' => '3'));
   $rows = array();
   while ($feed = db_fetch_object($result)) {
-    $rows[] = array(l($feed->title, "aggregator/sources/$feed->fid"), format_plural($feed->items, '1 item', '@count items'), ($feed->checked ? t('@time ago', array('@time' => format_interval(time() - $feed->checked))) : t('never')), ($feed->checked ? t('%time left', array('%time' => format_interval($feed->checked + $feed->refresh - time()))) : t('never')), l(t('edit'), "admin/content/aggregator/edit/feed/$feed->fid"), l(t('remove items'), "admin/content/aggregator/remove/$feed->fid"), l(t('update items'), "admin/content/aggregator/update/$feed->fid"));
+    $rows[] = array(
+      l($feed->title, "aggregator/sources/$feed->fid"),
+      format_plural($feed->items, '1 item', '@count items'),
+      ($feed->checked ? t('@time ago', array('@time' => format_interval(time() - $feed->checked))) : t('never')),
+      ($feed->checked ? t('%time left', array('%time' => format_interval($feed->checked + $feed->refresh - time()))) : t('never')),
+      l(t('edit'), "admin/content/aggregator/edit/feed/$feed->fid"),
+      l(t('remove items'), "admin/content/aggregator/remove/$feed->fid"),
+      l(t('update items'), "admin/content/aggregator/update/$feed->fid", array('query' => array('token' => drupal_get_token("aggregator/update/$feed->fid")))),
+    );
   }
   $output .= theme('table', $header, $rows);
 
@@ -209,6 +217,9 @@ function aggregator_admin_remove_feed_submit($form, &$form_state) {
  *   An associative array describing the feed to be refreshed.
  */
 function aggregator_admin_refresh_feed($feed) {
+  if (!isset($_GET['token']) || !drupal_valid_token($_GET['token'], 'aggregator/update/' . $feed['fid'])) {
+    return drupal_access_denied();
+  }
   aggregator_refresh($feed);
   drupal_goto('admin/content/aggregator');
 }
diff --git a/modules/openid/openid.module b/modules/openid/openid.module
index f1885df3d90fe182ec60bf379a4f1625eac6148f..71e0f5b051cc5c6952cad3aa9e679070456a6724 100644
--- a/modules/openid/openid.module
+++ b/modules/openid/openid.module
@@ -425,14 +425,17 @@ function openid_authentication($response) {
   elseif (variable_get('user_register', 1)) {
     // Register new user
     $form_state['redirect'] = NULL;
-    $form_state['values']['name'] = (empty($response['openid.sreg.nickname'])) ? '' : $response['openid.sreg.nickname'];
-    $form_state['values']['mail'] = (empty($response['openid.sreg.email'])) ? '' : $response['openid.sreg.email'];
+    // Only signed SREG keys are included as required by OpenID Simple
+    // Registration Extension 1.0, section 4.
+    $signed_keys = explode(',', $response['openid.signed']);
+    $form_state['values']['name'] = in_array('sreg.nickname', $signed_keys) ? $response['openid.sreg.nickname'] : '';
+    $form_state['values']['mail'] = in_array('sreg.email', $signed_keys) ? $response['openid.sreg.email'] : '';
     $form_state['values']['pass']  = user_password();
     $form_state['values']['status'] = variable_get('user_register', 1) == 1;
     $form_state['values']['response'] = $response;
     $form_state['values']['auth_openid'] = $identity;
 
-    if (empty($response['openid.sreg.email']) && empty($response['openid.sreg.nickname'])) {
+    if (empty($form_state['values']['name']) && empty($form_state['values']['mail'])) {
       drupal_set_message(t('Please complete the registration by filling out the form below. If you already have an account, you can <a href="@login">log in</a> now and add your OpenID under "My account".', array('@login' => url('user/login'))), 'warning');
       $success = FALSE;
     }
diff --git a/modules/system/system.module b/modules/system/system.module
index 70831442cb051bd765b4f6ada67ddf3b9898c69c..db9af51e198c3df543aa68201fef3d42d76daf07 100644
--- a/modules/system/system.module
+++ b/modules/system/system.module
@@ -8,7 +8,7 @@
 /**
  * The current system version.
  */
-define('VERSION', '6.23-dev');
+define('VERSION', '6.23');
 
 /**
  * Core API compatibility.