4 files changed, 23 insertions, 9 deletions
diff --git a/app/Http/Middleware/AuthEditor.php b/app/Http/Middleware/AuthEditor.php
index 860161f2b0..d4aed9a241 100644
--- a/app/Http/Middleware/AuthEditor.php
+++ b/app/Http/Middleware/AuthEditor.php
@@ -29,8 +29,8 @@ use Psr\Http\Message\ServerRequestInterface;
 use Psr\Http\Server\MiddlewareInterface;
 use Psr\Http\Server\RequestHandlerInterface;
 use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
-use function assert;
 use function redirect;
 use function route;
 
@@ -48,7 +48,11 @@ class AuthEditor implements MiddlewareInterface
     public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
     {
         $tree = $request->getAttribute('tree');
-        assert($tree instanceof Tree);
+
+        // We've matched a tree parameter in the route, but it is private or deleted.
+        if (!$tree instanceof Tree) {
+            throw new NotFoundHttpException(I18N::translate('You do not have permission to view this page.'));
+        }
 
         $user = $request->getAttribute('user');
 
diff --git a/app/Http/Middleware/AuthManager.php b/app/Http/Middleware/AuthManager.php
index bc84af5688..4390f2e0ac 100644
--- a/app/Http/Middleware/AuthManager.php
+++ b/app/Http/Middleware/AuthManager.php
@@ -30,6 +30,7 @@ use Psr\Http\Message\ServerRequestInterface;
 use Psr\Http\Server\MiddlewareInterface;
 use Psr\Http\Server\RequestHandlerInterface;
 use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
 use function redirect;
 use function route;
@@ -48,13 +49,14 @@ class AuthManager implements MiddlewareInterface
     public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
     {
         $tree = $request->getAttribute('tree');
-        $user = $request->getAttribute('user');
 
-        // Tree no longer exists?
+        // We've matched a tree parameter in the route, but it is private or deleted.
         if (!$tree instanceof Tree) {
-            return redirect(route(ControlPanel::class));
+            throw new NotFoundHttpException(I18N::translate('You do not have permission to view this page.'));
         }
 
+        $user = $request->getAttribute('user');
+
         // Logged in with the correct role?
         if (Auth::isManager($tree, $user)) {
             return $handler->handle($request);
diff --git a/app/Http/Middleware/AuthMember.php b/app/Http/Middleware/AuthMember.php
index 841ad9ac3e..8164fd9ac5 100644
--- a/app/Http/Middleware/AuthMember.php
+++ b/app/Http/Middleware/AuthMember.php
@@ -29,8 +29,8 @@ use Psr\Http\Message\ServerRequestInterface;
 use Psr\Http\Server\MiddlewareInterface;
 use Psr\Http\Server\RequestHandlerInterface;
 use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
-use function assert;
 use function redirect;
 use function route;
 
@@ -48,7 +48,11 @@ class AuthMember implements MiddlewareInterface
     public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
     {
         $tree = $request->getAttribute('tree');
-        assert($tree instanceof Tree);
+
+        // We've matched a tree parameter in the route, but it is private or deleted.
+        if (!$tree instanceof Tree) {
+            throw new NotFoundHttpException(I18N::translate('You do not have permission to view this page.'));
+        }
 
         $user = $request->getAttribute('user');
 
diff --git a/app/Http/Middleware/AuthModerator.php b/app/Http/Middleware/AuthModerator.php
index 0f61d570fa..cc5fa1cc38 100644
--- a/app/Http/Middleware/AuthModerator.php
+++ b/app/Http/Middleware/AuthModerator.php
@@ -29,8 +29,8 @@ use Psr\Http\Message\ServerRequestInterface;
 use Psr\Http\Server\MiddlewareInterface;
 use Psr\Http\Server\RequestHandlerInterface;
 use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
-use function assert;
 use function redirect;
 use function route;
 
@@ -48,7 +48,11 @@ class AuthModerator implements MiddlewareInterface
     public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
     {
         $tree = $request->getAttribute('tree');
-        assert($tree instanceof Tree);
+
+        // We've matched a tree parameter in the route, but it is private or deleted.
+        if (!$tree instanceof Tree) {
+            throw new NotFoundHttpException(I18N::translate('You do not have permission to view this page.'));
+        }
 
         $user = $request->getAttribute('user');