Substitute variables in 'password_ldap_search_base' value

plugins/password/drivers/ldap.php

@@ -146,7 +146,7 @@ class rcube_ldap_password
             return '';
         }
 
-        $base = $rcmail->config->get('password_ldap_search_base');
+        $base   = self::substitute_vars($rcmail->config->get('password_ldap_search_base'));
         $filter = self::substitute_vars($rcmail->config->get('password_ldap_search_filter'));
         $options = array (
             'scope' => 'sub',

plugins/password/drivers/ldap_simple.php

@@ -187,6 +187,8 @@ class rcube_ldap_simple_password
 
         $search_base   = $rcmail->config->get('password_ldap_search_base');
         $search_filter = $rcmail->config->get('password_ldap_search_filter');
+
+        $search_base   = rcube_ldap_password::substitute_vars($search_base);
         $search_filter = rcube_ldap_password::substitute_vars($search_filter);
 
         $this->_debug("C: Search $search_base for $search_filter");