diff --git a/includes/configure_client.php b/includes/configure_client.php
index 980c44d9..accc7f26 100755
--- a/includes/configure_client.php
+++ b/includes/configure_client.php
@@ -17,8 +17,9 @@ function DisplayWPAConfig()
 
     if (isset($_POST['connect'])) {
         $result = 0;
+        $iface = escapeshellarg($_SESSION['wifi_client_interface']);
         $netid = intval($_POST['connect']);
-        exec('sudo wpa_cli -i ' . $_SESSION['wifi_client_interface'] . ' select_network ' . $netid);
+        exec('sudo wpa_cli -i ' . $iface . ' select_network ' . $netid);
         $status->addMessage('New network selected', 'success');
     } elseif (isset($_POST['wpa_reinit'])) {
         $status->addMessage('Reinitializing wpa_supplicant', 'info', false);