Sylius is an open source eCommerce platform. Prior to versions 1.9.10, 1.10.11, and 1.11.2, it is possible for a page controlled by an attacker to load the website within an iframe. This will enable a clickjacking attack, in which the attacker's page overlays the target application's interface with a different interface provided by the attacker. The issue is fixed in versions 1.9.10, 1.10.11, and 1.11.2. A workaround is available. Every response from app should have an X-Frame-Options header set to: ``sameorigin``. To achieve that, add a new `subscriber` in the app.

Affected: Packagist: sylius/sylius

### Impact

It is possible for a page controlled by an attacker to load the website within an iframe. This will enable a clickjacking attack, in which the attacker's page overlays the target application's interface with a different interface provided by the attacker

### Patches

The issue is fixed in versions: 1.9.10, 1.10.11, 1.11.2, and above.

### Workarounds

Every response from app should have an X-Frame-Options header set to: ``sameorigin``. To achieve that you just need to add a new **subscriber** in your app.

```php <?php

// src/EventListener/XFrameOptionsSubscriber.php

namespace App\EventListener

final class XFrameOptionsSubscriber implements EventSubscriberInterface { public static function getSubscribedEvents(): array { return [ KernelEvents::RESPONSE => 'onKernelResponse', ]; }

public function onKernelResponse(ResponseEvent $event): void { if (!$this->isMainRequest($event)) { return; }

$response = $event->getResponse();

$response->headers->set('X-Frame-Options', 'sameorigin'); }

private function isMainRequest(ResponseEvent $event): bool { if (\method_exists($event, 'isMainRequest')) { return $event->isMainRequest(); }

return $event->isMasterRequest(); } }

```

And register it in the container:

```yaml # config/services.yaml services: # ... App\EventListener\XFrameOptionsSubscriber: tags: ['ker…