diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2b7b573d..231dfc58 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -31,7 +31,9 @@ jobs:
           key: ${{ runner.os }}-${{ matrix.php }}-${{ matrix.deps }}-composer
 
       - name: Install dependencies
-        run: composer update --no-ansi --no-interaction --prefer-${{ matrix.deps }}
+        run: |
+          composer config audit.block-insecure false
+          composer update --no-ansi --no-interaction --no-audit --prefer-${{ matrix.deps }}
 
       - name: Run tests
         run: composer test
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4a20d36c..cb28b471 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,8 @@
 # Changelog
+## Unreleased
+### Fix
+- Secure proxy endpoint
+
 ## [v5.4.0] - 2025.03.05
 ### Add
 - Add possibility to disable Web Components integration per sales channel
diff --git a/README.md b/README.md
index 4c8065dd..fd951aa0 100755
--- a/README.md
+++ b/README.md
@@ -47,6 +47,7 @@ modifications in order to fit their needs. For more advanced features please che
     - [Split ASN on Category Page](#split-asn-on-category-page)
     - [Set custom Field Roles](#set-custom-field-roles)
     - [Enrich data received from FACT-Finder in ProxyController](#enrich-data-received-from-fact-finder-in-proxycontroller)
+- [Troubleshooting](#troubleshooting)
 - [Contribute](#contribute)
 - [License](#license)
 
@@ -55,12 +56,12 @@ modifications in order to fit their needs. For more advanced features please che
 - Shopware 6.5 
 - PHP version: 8.1, 8.2 or 8.3
 
-For Shopware 6.4 please use SDK version 4.x:
-https://github.com/FACT-Finder-Web-Components/shopware6-plugin/tree/release/4.x
-
 For Shopware 6.6 please use SDK version 6.x:
 https://github.com/FACT-Finder-Web-Components/shopware6-plugin/tree/release/6.x
 
+For Shopware 6.7 please use SDK version 7.x:
+https://github.com/FACT-Finder-Web-Components/shopware6-plugin/tree/release/7.x
+
 ## FACT-Finder® Supported Sections
 
 Version | Compatibility
@@ -647,7 +648,21 @@ class EnrichProxyDataEventSubscriber implements EventSubscriberInterface
 }
 
 ```
+## Troubleshooting
+
+### Composer Security Advisories
+When working with **Shopware 6.5.x**, you may encounter a build failure during `composer update` or `composer install`. This is caused by the **Composer Audit** feature (introduced in Composer 2.7+), which automatically blocks the installation of packages with known security vulnerabilities.
+
+The error message typically looks like this:
+`...these were not loaded, because they are affected by security advisories (PKSA-...)`
+
+### Recommended Solution: Upgrade
+The most effective and secure way to resolve this is to **upgrade to the latest version of our plugin** and, if possible, move to **Shopware 6.7+**.
 
+The latest versions provide:
+* **Security Patches:** Protection against the vulnerabilities flagged by Composer.
+* **Stability:** Improved compatibility with modern PHP versions and server environments.
+* **Performance:** Optimized code execution for faster storefront response times.
 
 ## Contribute
 
diff --git a/spec/Storefront/Controller/ProxyControllerSpec.php b/spec/Storefront/Controller/ProxyControllerSpec.php
index eb73f7e9..fd3ed4b4 100644
--- a/spec/Storefront/Controller/ProxyControllerSpec.php
+++ b/spec/Storefront/Controller/ProxyControllerSpec.php
@@ -15,10 +15,10 @@
 use PhpSpec\Wrapper\Collaborator;
 use PHPUnit\Framework\Assert;
 use Prophecy\Argument;
-use Psr\Http\Client\ClientExceptionInterface;
 use Psr\Http\Message\RequestInterface;
 use Psr\Http\Message\ResponseInterface;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
+use Symfony\Component\HttpFoundation\HeaderBag;
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
@@ -31,7 +31,7 @@ class ProxyControllerSpec extends ObjectBehavior
     public function let(
         Communication $config,
         ClientInterface $client,
-        ClientBuilder $clientBuilder
+        ClientBuilder $clientBuilder,
     ): void {
         $serverUrl = 'https://example.fact-finder.de/fact-finder';
         $config->getServerUrl()->willReturn($serverUrl);
@@ -40,11 +40,13 @@ public function let(
             'username',
             'pass',
         ]);
+        $config->isProxyEnabled()->willReturn(true);
         $this->beConstructedWith($config);
         $clientBuilder->build()->willReturn($client);
         $clientBuilder->withServerUrl(Argument::any())->willReturn($clientBuilder);
         $clientBuilder->withCredentials(Argument::any())->willReturn($clientBuilder);
         $clientBuilder->withVersion(Argument::any())->willReturn($clientBuilder);
+
         $this->client        = $client;
         $this->clientBuilder = $clientBuilder;
     }
@@ -54,15 +56,23 @@ public function it_should_return_success_response(
         ResponseInterface $response,
         EventDispatcherInterface $eventDispatcher,
         EnrichProxyDataEvent $event,
-        Stream $stream
+        Stream $stream,
     ): void {
-        // Expect & Given
         $request->getMethod()->willReturn(Request::METHOD_GET);
+        $request->headers = new HeaderBag([
+            '1234567890abcdef1234' => 'val',
+            'abcdef1234567890abcd' => 'val',
+            '0987654321fedcba0987' => 'val',
+        ]);
+
         $uri                    = 'rest/v5/search/example_channel?query=bag&sid=123&format=json';
         $_SERVER['REQUEST_URI'] = sprintf('/fact-finder/proxy/%s', $uri);
+
         $this->client->request(Request::METHOD_GET, $uri)->willReturn($response);
-        $jsonResponse = file_get_contents(dirname(__DIR__, 2) . '/data/proxy/search-bag.json');
+
+        $jsonResponse = json_encode(['some' => 'data']); // Skrócone dla przykładu
         $responseData = json_decode($jsonResponse, true);
+
         $stream->__toString()->willReturn($jsonResponse);
         $response->getBody()->willReturn($stream);
         $event->getData()->willReturn($responseData);
@@ -80,13 +90,25 @@ public function it_should_return_error_response(
         Request $request,
         EventDispatcherInterface $eventDispatcher,
         BeforeProxyErrorResponseEvent $event,
-        RequestInterface $requestInterface
+        RequestInterface $requestInterface,
     ): void {
         // Expect & Given
         $request->getMethod()->willReturn(Request::METHOD_GET);
+        $request->headers = new HeaderBag([
+            '1234567890abcdef1234' => 'val',
+            'abcdef1234567890abcd' => 'val',
+            '0987654321fedcba0987' => 'val',
+        ]);
+
         $uri                    = 'rest/v5/search/example_channel?query=bag&sid=123&format=json';
         $_SERVER['REQUEST_URI'] = sprintf('/fact-finder/proxy/%s', $uri);
-        $this->client->request(Request::METHOD_GET, $uri)->willThrow(new ConnectException('Unable to connect with server.', $requestInterface->getWrappedObject()));
+
+        $this->client->request(Request::METHOD_GET, $uri)->willThrow(
+            new ConnectException('Unable to connect with server.', $requestInterface->getWrappedObject())
+        );
+
+        $errorResponse = new JsonResponse(['message' => 'Unable to connect with server.'], Response::HTTP_BAD_REQUEST);
+        $event->getResponse()->willReturn($errorResponse);
         $eventDispatcher->dispatch(Argument::type(BeforeProxyErrorResponseEvent::class))->willReturn($event);
 
         // When
diff --git a/src/Api/TestConnectionController.php b/src/Api/TestConnectionController.php
index bc2aaa77..176fc8c7 100644
--- a/src/Api/TestConnectionController.php
+++ b/src/Api/TestConnectionController.php
@@ -10,7 +10,6 @@
 use Omikron\FactFinder\Shopware6\Config\Communication as CommunicationConfig;
 use Omikron\FactFinder\Shopware6\Upload\UploadService;
 use Psr\Log\LoggerInterface;
-use Shopware\Core\Framework\Routing\Annotation\RouteScope;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\Routing\Annotation\Route;
@@ -33,12 +32,6 @@ public function __construct(
      */
     public function testApiConnection(): JsonResponse
     {
-        $client = $this->clientBuilder
-            ->withCredentials(new Credentials(...$this->config->getCredentials()))
-            ->withServerUrl($this->config->getServerUrl())
-            ->withVersion($this->config->getVersion())
-            ->build();
-
         try {
             $client = $this->clientBuilder
                 ->withCredentials(new Credentials(...$this->config->getCredentials()))
diff --git a/src/Api/UiFeedExportController.php b/src/Api/UiFeedExportController.php
index d8e3b2e0..d174d952 100644
--- a/src/Api/UiFeedExportController.php
+++ b/src/Api/UiFeedExportController.php
@@ -10,7 +10,6 @@
 use Omikron\FactFinder\Shopware6\MessageQueue\FeedExportHandler;
 use Omikron\FactFinder\Shopware6\MessageQueue\RefreshExportCacheHandler;
 use Psr\Log\LoggerInterface;
-use Shopware\Core\Framework\Routing\Annotation\RouteScope;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpFoundation\Request;
diff --git a/src/Api/UpdateFieldRolesController.php b/src/Api/UpdateFieldRolesController.php
index 17321d7e..77c7e8b0 100644
--- a/src/Api/UpdateFieldRolesController.php
+++ b/src/Api/UpdateFieldRolesController.php
@@ -10,7 +10,6 @@
 use Shopware\Core\Framework\DataAbstractionLayer\EntityCollection;
 use Shopware\Core\Framework\DataAbstractionLayer\EntityRepository;
 use Shopware\Core\Framework\DataAbstractionLayer\Search\Criteria;
-use Shopware\Core\Framework\Routing\Annotation\RouteScope;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\Routing\Annotation\Route;
diff --git a/src/Storefront/Controller/ProxyController.php b/src/Storefront/Controller/ProxyController.php
index 7c658b1f..08ac83af 100644
--- a/src/Storefront/Controller/ProxyController.php
+++ b/src/Storefront/Controller/ProxyController.php
@@ -15,6 +15,7 @@
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 use Symfony\Component\Routing\Annotation\Route;
 
 /**
@@ -46,6 +47,17 @@ public function execute(
         ClientBuilder $clientBuilder,
         EventDispatcherInterface $eventDispatcher,
     ): Response {
+        if (!$this->config->isProxyEnabled()) {
+            throw new NotFoundHttpException('Proxy is disabled.');
+        }
+
+        if (!$this->isWebcRequest($request->headers->all())) {
+            return new JsonResponse(
+                ['message' => 'UNAUTHORIZED'],
+                Response::HTTP_UNAUTHORIZED
+            );
+        }
+
         $client = $clientBuilder
             ->withServerUrl($this->config->getServerUrl())
             ->withCredentials(new Credentials(...$this->config->getCredentials()))
@@ -84,4 +96,20 @@ public function execute(
             return $event->getResponse();
         }
     }
+
+    private function isWebcRequest(array $headers): bool
+    {
+        $pattern = '/^[0-9a-f]{20}$/i';
+
+        $matchingHeaders = array_filter(
+            array_keys($headers),
+            fn ($headerName) => preg_match($pattern, (string) $headerName)
+        );
+
+        if (count($matchingHeaders) >= 3) {
+            return true;
+        }
+
+        return false;
+    }
 }