diff --git a/lib/plugins/acl/admin.php b/lib/plugins/acl/admin.php
index 59671a0cba64f976c307daae5846aea699ec578d..a3fb4636d1c9c46f8d5a675f6689b8461e840529 100644
--- a/lib/plugins/acl/admin.php
+++ b/lib/plugins/acl/admin.php
@@ -31,7 +31,7 @@ class admin_plugin_acl extends DokuWiki_Admin_Plugin {
         return array(
             'author' => 'Andreas Gohr',
             'email'  => 'andi@splitbrain.org',
-            'date'   => '2009-08-07',
+            'date'   => '2010-01-17',
             'name'   => 'ACL Manager',
             'desc'   => 'Manage Page Access Control Lists',
             'url'    => 'http://dokuwiki.org/plugin:acl',
@@ -67,6 +67,7 @@ class admin_plugin_acl extends DokuWiki_Admin_Plugin {
         // fresh 1:1 copy without replacements
         $AUTH_ACL = file(DOKU_CONF.'acl.auth.php');
 
+
         // namespace given?
         if($_REQUEST['ns'] == '*'){
             $this->ns = '*';
@@ -89,7 +90,8 @@ class admin_plugin_acl extends DokuWiki_Admin_Plugin {
         }
 
         // handle modifications
-        if(isset($_REQUEST['cmd'])){
+        if(isset($_REQUEST['cmd']) && checkSecurityToken()){
+
             // scope for modifications
             if($this->ns){
                 if($this->ns == '*'){
@@ -310,6 +312,7 @@ class admin_plugin_acl extends DokuWiki_Admin_Plugin {
         echo '<input type="hidden" name="id" value="'.hsc($ID).'" />'.NL;
         echo '<input type="hidden" name="do" value="admin" />'.NL;
         echo '<input type="hidden" name="page" value="acl" />'.NL;
+        echo '<input type="hidden" name="sectok" value="'.getSecurityToken().'" />'.NL;
         echo '</div></form>'.NL;
     }
 
@@ -480,11 +483,11 @@ class admin_plugin_acl extends DokuWiki_Admin_Plugin {
                 $alt   = '+';
             }
             $ret .= '<img src="'.$img.'" alt="'.$alt.'" />';
-            $ret .= '<a href="'.wl('',$this->_get_opts(array('ns'=>$item['id']))).'" class="idx_dir'.$cl.'">';
+            $ret .= '<a href="'.wl('',$this->_get_opts(array('ns'=>$item['id'],'sectok'=>getSecurityToken()))).'" class="idx_dir'.$cl.'">';
             $ret .= $base;
             $ret .= '</a>';
         }else{
-            $ret .= '<a href="'.wl('',$this->_get_opts(array('id'=>$item['id'],'ns'=>''))).'" class="wikilink1'.$cl.'">';
+            $ret .= '<a href="'.wl('',$this->_get_opts(array('id'=>$item['id'],'ns'=>'','sectok'=>getSecurityToken()))).'" class="wikilink1'.$cl.'">';
             $ret .= noNS($item['id']);
             $ret .= '</a>';
         }
@@ -562,6 +565,7 @@ class admin_plugin_acl extends DokuWiki_Admin_Plugin {
         echo '<input type="hidden" name="acl_w" value="'.hsc($this->who).'" />'.NL;
         echo '<input type="hidden" name="do" value="admin" />'.NL;
         echo '<input type="hidden" name="page" value="acl" />'.NL;
+        echo '<input type="hidden" name="sectok" value="'.getSecurityToken().'" />'.NL;
         echo '<table class="inline">';
         echo '<tr>';
         echo '<th>'.$this->getLang('where').'</th>';
diff --git a/lib/plugins/acl/ajax.php b/lib/plugins/acl/ajax.php
index e383f0d352ed2d93fe03fb0d9eda2ecef18a1eaa..d3e88d932edb4429c06aec20b0f1f4512c8be6a6 100644
--- a/lib/plugins/acl/ajax.php
+++ b/lib/plugins/acl/ajax.php
@@ -19,11 +19,11 @@ require_once(DOKU_INC.'inc/auth.php');
 //close session
 session_write_close();
 
-if(!auth_isadmin()) die('forbidden');
+if(!auth_isadmin()) die('for admins only');
+if(!checkSecurityToken()) die('CRSF Attack');
 
 $ID    = getID();
 
-if(!auth_isadmin) die('for admins only');
 require_once(DOKU_INC.'inc/pluginutils.php');
 require_once(DOKU_INC.'inc/html.php');
 $acl = plugin_load('admin','acl');
diff --git a/lib/plugins/acl/script.js b/lib/plugins/acl/script.js
index 7ab83db585852e020f3b5cbc24f1828259410d10..449a3c16a5ded6c5e2097df8cbda2d49a7b59ff7 100644
--- a/lib/plugins/acl/script.js
+++ b/lib/plugins/acl/script.js
@@ -48,7 +48,8 @@ acl = {
         data[1] = ajax.encVar('id',frm.elements['id'].value);
         data[2] = ajax.encVar('acl_t',frm.elements['acl_t'].value);
         data[3] = ajax.encVar('acl_w',frm.elements['acl_w'].value);
-        data[4] = ajax.encVar('ajax','info');
+        data[4] = ajax.encVar('sectok',frm.elements['sectok'].value);
+        data[5] = ajax.encVar('ajax','info');
 
         ajax.elementObj = $('acl__info');