diff --git a/wcfsetup/install/files/lib/system/request/ControllerMap.class.php b/wcfsetup/install/files/lib/system/request/ControllerMap.class.php
index ac0b7aa7710..29914b761fd 100644
--- a/wcfsetup/install/files/lib/system/request/ControllerMap.class.php
+++ b/wcfsetup/install/files/lib/system/request/ControllerMap.class.php
@@ -68,7 +68,7 @@ protected function init()
      * @param string $controller url controller
      * @param bool $isAcpRequest true if this is an ACP request
      * @param bool $skipCustomUrls true if custom url resolution should be suppressed, is always true for ACP requests
-     * @return  mixed       array containing className, controller and pageType or a string containing the controller name for aliased controllers
+     * @return  mixed       array containing className and controller or a string containing the controller name for aliased controllers
      * @throws  SystemException
      */
     public function resolve($application, $controller, $isAcpRequest, $skipCustomUrls = false)
@@ -167,7 +167,6 @@ public function resolveCustomController($application, $controller)
                 return [
                     'className' => CmsPage::class,
                     'controller' => 'cms',
-                    'pageType' => 'page',
 
                     // CMS page meta data
                     'cmsPageID' => $matches['pageID'],
@@ -179,7 +178,6 @@ public function resolveCustomController($application, $controller)
                 return [
                     'className' => $data,
                     'controller' => $matches[1],
-                    'pageType' => \strtolower($matches[2]),
                 ];
             }
         }
@@ -356,17 +354,16 @@ public function isDefaultController($application, $controller)
     /**
      * Returns true if currently active request represents the landing page.
      *
-     * @param string[] $classData
      * @param array $metaData
      * @return  bool
      */
-    public function isLandingPage(array $classData, array $metaData)
+    public function isLandingPage(string $className, array $metaData)
     {
-        if ($classData['className'] !== $this->landingPages['wcf'][2]) {
+        if ($className !== $this->landingPages['wcf'][2]) {
             return false;
         }
 
-        if ($classData['className'] === CmsPage::class) {
+        if ($className === CmsPage::class) {
             // check if page id matches
             if ($this->landingPages['wcf'][1] !== '__WCF_CMS__' . $metaData['cms']['pageID']) {
                 return false;
@@ -399,7 +396,7 @@ public function getApplicationOverride($application, $controller)
      * @param string $application application identifier
      * @param string $controller controller name
      * @param bool $isAcpRequest true if this is an ACP request
-     * @return      string[]|null   className, controller and pageType, or null if this is not a legacy controller name
+     * @return      string[]|null   className and controller, or null if this is not a legacy controller name
      */
     protected function getLegacyClassData($application, $controller, $isAcpRequest)
     {
@@ -407,11 +404,10 @@ protected function getLegacyClassData($application, $controller, $isAcpRequest)
         if (isset($this->ciControllers['lookup'][$application][$environment][$controller])) {
             $className = $this->ciControllers['lookup'][$application][$environment][$controller];
 
-            if (\preg_match('~\\\\(?P<controller>[^\\\\]+)(?P<pageType>Action|Form|Page)$~', $className, $matches)) {
+            if (\preg_match('~\\\\(?P<controller>[^\\\\]+)(Action|Form|Page)$~', $className, $matches)) {
                 return [
                     'className' => $className,
                     'controller' => $matches['controller'],
-                    'pageType' => \strtolower($matches['pageType']),
                 ];
             }
         }
@@ -427,7 +423,7 @@ protected function getLegacyClassData($application, $controller, $isAcpRequest)
      * @param string $controller controller name
      * @param bool $isAcpRequest true if this is an ACP request
      * @param string $pageType page type, e.g. 'form' or 'action'
-     * @return  string[]|null   className, controller and pageType
+     * @return  string[]|null   className and controller
      */
     protected function getClassData($application, $controller, $isAcpRequest, $pageType)
     {
@@ -453,7 +449,6 @@ protected function getClassData($application, $controller, $isAcpRequest, $pageT
         return [
             'className' => $className,
             'controller' => $controller,
-            'pageType' => $pageType,
         ];
     }
 
diff --git a/wcfsetup/install/files/lib/system/request/Request.class.php b/wcfsetup/install/files/lib/system/request/Request.class.php
index d20c144faea..d12a6607e60 100644
--- a/wcfsetup/install/files/lib/system/request/Request.class.php
+++ b/wcfsetup/install/files/lib/system/request/Request.class.php
@@ -41,18 +41,6 @@ final class Request implements RequestHandlerInterface
      */
     protected $pageID;
 
-    /**
-     * page name
-     * @var string
-     */
-    protected $pageName = '';
-
-    /**
-     * page type
-     * @var string
-     */
-    protected $pageType = '';
-
     /**
      * request object
      * @var object
@@ -63,16 +51,12 @@ final class Request implements RequestHandlerInterface
      * Creates a new request object.
      *
      * @param string $className fully qualified name
-     * @param string $pageName class name
-     * @param string $pageType can be 'action', 'form' or 'page'
      * @param string[] $metaData additional meta data
      */
-    public function __construct($className, $pageName, $pageType, array $metaData)
+    public function __construct($className, array $metaData)
     {
         $this->className = $className;
         $this->metaData = $metaData;
-        $this->pageName = $pageName;
-        $this->pageType = $pageType;
     }
 
     /**
@@ -144,26 +128,6 @@ public function getMetaData()
         return $this->metaData;
     }
 
-    /**
-     * Returns the page name of this request.
-     *
-     * @return  string
-     */
-    public function getPageName()
-    {
-        return $this->pageName;
-    }
-
-    /**
-     * Returns the page type of this request.
-     *
-     * @return  string
-     */
-    public function getPageType()
-    {
-        return $this->pageType;
-    }
-
     /**
      * Returns the current request object.
      *
diff --git a/wcfsetup/install/files/lib/system/request/RequestHandler.class.php b/wcfsetup/install/files/lib/system/request/RequestHandler.class.php
index 9b4c719ff3e..61b0146377e 100644
--- a/wcfsetup/install/files/lib/system/request/RequestHandler.class.php
+++ b/wcfsetup/install/files/lib/system/request/RequestHandler.class.php
@@ -26,11 +26,11 @@
  * Handles http requests.
  *
  * @author  Marcel Werk
- * @copyright   2001-2020 WoltLab GmbH
+ * @copyright   2001-2022 WoltLab GmbH
  * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
  * @package WoltLabSuite\Core\System\Request
  */
-class RequestHandler extends SingletonFactory
+final class RequestHandler extends SingletonFactory
 {
     /**
      * active request object
@@ -122,9 +122,15 @@ protected function buildRequest($application)
         try {
             $routeData = RouteHandler::getInstance()->getRouteData();
 
-            // handle landing page for frontend requests
-            if (!$this->isACPRequest()) {
-                $this->handleDefaultController($application, $routeData);
+            \assert(RouteHandler::getInstance()->isDefaultController() || $routeData['controller']);
+
+            if ($this->isACPRequest()) {
+                if (empty($routeData['controller'])) {
+                    $routeData['controller'] = 'index';
+                }
+            } else {
+                // handle landing page for frontend requests
+                $routeData = $this->handleDefaultController($application, $routeData);
 
                 // check if accessing from the wrong domain (e.g. "www." omitted but domain was configured with)
                 $domainName = ApplicationHandler::getInstance()->getDomainName();
@@ -143,23 +149,13 @@ protected function buildRequest($application)
 
                     exit;
                 }
-            } elseif (empty($routeData['controller'])) {
-                $routeData['controller'] = 'index';
             }
 
-            $controller = $routeData['controller'];
-
             if (isset($routeData['className'])) {
-                $classData = [
-                    'className' => $routeData['className'],
-                    'controller' => $routeData['controller'],
-                    'pageType' => $routeData['pageType'],
-                ];
-
-                unset($routeData['className']);
-                unset($routeData['controller']);
-                unset($routeData['pageType']);
+                $className = $routeData['className'];
             } else {
+                $controller = $routeData['controller'];
+
                 if (
                     $this->isACPRequest()
                     && ($controller === 'login' || $controller === 'index')
@@ -191,6 +187,8 @@ protected function buildRequest($application)
                 );
                 if (\is_string($classData)) {
                     $this->redirect($routeData, $application, $classData);
+                } else {
+                    $className = $classData['className'];
                 }
             }
 
@@ -208,21 +206,16 @@ protected function buildRequest($application)
                 ) {
                     WCF::setLanguage($routeData['cmsPageLanguageID']);
                 }
-
-                unset($routeData['cmsPageID']);
-                unset($routeData['cmsPageLanguageID']);
             }
 
             $this->activeRequest = new Request(
-                $classData['className'],
-                $classData['controller'],
-                $classData['pageType'],
+                $className,
                 $metaData
             );
 
             if (!$this->isACPRequest()) {
                 // determine if current request matches the landing page
-                if (ControllerMap::getInstance()->isLandingPage($classData, $metaData)) {
+                if (ControllerMap::getInstance()->isLandingPage($className, $metaData)) {
                     $this->activeRequest->setIsLandingPage();
                 }
             }
@@ -244,15 +237,11 @@ protected function buildRequest($application)
      * Redirects to the actual URL, e.g. controller has been aliased or mistyped (boardlist instead of board-list).
      *
      * @param string[] $routeData
-     * @param string $application
-     * @param string $controller
      */
-    protected function redirect(array $routeData, $application, $controller = null)
+    protected function redirect(array $routeData, string $application, string $controller)
     {
         $routeData['application'] = $application;
-        if ($controller !== null) {
-            $routeData['controller'] = $controller;
-        }
+        $routeData['controller'] = $controller;
 
         // append the remaining query parameters
         foreach ($_GET as $key => $value) {
@@ -274,10 +263,10 @@ protected function redirect(array $routeData, $application, $controller = null)
      * @param string[] $routeData
      * @throws  IllegalLinkException
      */
-    protected function handleDefaultController($application, array &$routeData)
+    protected function handleDefaultController(string $application, array $routeData): array
     {
         if (!RouteHandler::getInstance()->isDefaultController()) {
-            return;
+            return $routeData;
         }
 
         $data = ControllerMap::getInstance()->lookupDefaultController($application);
@@ -315,6 +304,8 @@ protected function handleDefaultController($application, array &$routeData)
         }
 
         $routeData['isDefaultController'] = true;
+
+        return $routeData;
     }
 
     /**
diff --git a/wcfsetup/install/files/lib/system/request/RouteHandler.class.php b/wcfsetup/install/files/lib/system/request/RouteHandler.class.php
index bcd213338b9..c84c417226d 100644
--- a/wcfsetup/install/files/lib/system/request/RouteHandler.class.php
+++ b/wcfsetup/install/files/lib/system/request/RouteHandler.class.php
@@ -144,6 +144,15 @@ public function matches()
                 $this->isDefaultController = $this->routeData['isDefaultController'];
                 unset($this->routeData['isDefaultController']);
 
+                if (!isset($this->routeData['controller']) || $this->routeData['controller'] === '') {
+                    if (!$this->isDefaultController()) {
+                        throw new \DomainException(\sprintf(
+                            "Route implementation '%s' is buggy: Matched route is not the default controller, but no controller was returned.",
+                            $route::class
+                        ));
+                    }
+                }
+
                 if (isset($this->routeData['isRenamedController'])) {
                     $this->isRenamedController = $this->routeData['isRenamedController'];
                     unset($this->routeData['isRenamedController']);