diff --git a/ag/clan/add.php b/ag/clan/add.php
index 2710d45..1f399ff 100644
--- a/ag/clan/add.php
+++ b/ag/clan/add.php
@@ -14,8 +14,8 @@ include_once (ROOT_PATH . '/include/clan.inc.php');
 // GET-Section
 // Kritisch (SQL-Injections)
 $clanid = validateUnsignedInteger($_GET['clanid'], null);
-$poll1 = validateString($_GET['poll1']);
-$poll2 = validateString('ASC');
+$poll1 = validateStringCritical($_GET['poll1']);
+$poll2 = validateStringCritical($_GET['poll2']);
 $pagenum = validateUnsignedInteger($_GET['pagenum'], null);
 
 // Unkritisch
diff --git a/ag/include/parse.inc.php b/ag/include/parse.inc.php
index 9e008a8..dbe9568 100644
--- a/ag/include/parse.inc.php
+++ b/ag/include/parse.inc.php
@@ -302,6 +302,11 @@ function validateStringArray($value){
 	return $value;
 }
 
+function validateStringCritical($value) {
+	$value = validateString($value);
+	return preg_replace('#[()\]\[\s]#', '', $value);
+}
+
 function validateEmailAddress($mail){
 	return validateString($mail);
 }
diff --git a/ag/info/attacken.php b/ag/info/attacken.php
index 373be6a..a8130bf 100644
--- a/ag/info/attacken.php
+++ b/ag/info/attacken.php
@@ -395,8 +395,8 @@ $fruchttyp= validateString($_GET['fruchttyp']);
 $rassen = validateUnsignedInteger($_GET['rassen']);
 $tf = validateUnsignedInteger($_GET['tf']);
 $search = validateString($_GET['search']);
-$order = validateString($_GET['order']);
-$order_art = validateString($_GET['order_art']);
+$order = validateStringCritical($_GET['order']);
+$order_art = validateStringCritical($_GET['order_art']);
 $pagenum = validateUnsignedInteger($_GET['pagenum']);
 $seiten = validateUnsignedInteger($_GET['seiten']);
 $last_klick1 = validateString($_GET['last_klick1']);
diff --git a/ag/markt.php b/ag/markt.php
index 5db2b25..1f9745c 100644
--- a/ag/markt.php
+++ b/ag/markt.php
@@ -40,7 +40,7 @@ $item_9 = validateUnsignedInteger($_GET['item_9'], null);
 $item_10 = validateUnsignedInteger($_GET['item_10'], null);
 $pagenum = validateUnsignedInteger($_GET['pagenum'], null);
 $oder = validateString($_GET['oder']);
-$ords = validateString($_GET['ords']);
+$ords = validateStringCritical($_GET['ords']);
 $charm = validateString($_GET['charm']);
 
 // Unkritisch
diff --git a/ag/ranglist.php b/ag/ranglist.php
index 99e7792..117ccb0 100644
--- a/ag/ranglist.php
+++ b/ag/ranglist.php
@@ -15,7 +15,7 @@ include_once(ROOT_PATH.'/include/char.inc.php');
 
 // GET-Section
 // Kritisch (SQL-Injections)
-$wahl = validateString($_GET['wahl']);
+$wahl = validateStringCritical($_GET['wahl']);
 $char_name = validateName($_GET['char_name']);
 
 $char_vorhanden = mysql_num_rows(mysql_query('SELECT id FROM chars WHERE name like \''.$char_name.'%\' LIMIT 1'));