diff --git a/CHANGELOG.md b/CHANGELOG.md
index c2bb962b03..94e227db7e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ HumHub Changelog
 - Fix #6108: Fix log time in the `date()` function
 - Fix #6122: Fix deleting a content with empty reason
 - Fix #6128: Reset backuped content after submit form
+- Fix #6142: Fix saving empty values in admin settings
 
 1.13.1 (January 25, 2023)
 -------------------------
diff --git a/protected/humhub/modules/admin/models/forms/DesignSettingsForm.php b/protected/humhub/modules/admin/models/forms/DesignSettingsForm.php
index 2e9016f49d..4350ce64e0 100644
--- a/protected/humhub/modules/admin/models/forms/DesignSettingsForm.php
+++ b/protected/humhub/modules/admin/models/forms/DesignSettingsForm.php
@@ -67,6 +67,7 @@ class DesignSettingsForm extends Model
     public function rules()
     {
         return [
+            ['paginationSize', 'required'],
             ['paginationSize', 'integer', 'max' => 200, 'min' => 1],
             ['theme', 'in', 'range' => $this->getThemes()],
             [['displayNameFormat', 'displayNameSubFormat', 'spaceOrder'], 'safe'],
diff --git a/protected/humhub/modules/admin/models/forms/FileSettingsForm.php b/protected/humhub/modules/admin/models/forms/FileSettingsForm.php
index ca9d63e2e2..6ba658cf7b 100644
--- a/protected/humhub/modules/admin/models/forms/FileSettingsForm.php
+++ b/protected/humhub/modules/admin/models/forms/FileSettingsForm.php
@@ -43,7 +43,9 @@ class FileSettingsForm extends \yii\base\Model
     {
         return [
             [['allowedExtensions'], 'match', 'pattern' => '/^[A-Za-z0-9_,]+$/u'],
-            [['maxFileSize', 'useXSendfile', 'excludeMediaFilesPreview'], 'integer'],
+            [['useXSendfile', 'excludeMediaFilesPreview'], 'integer'],
+            [['maxFileSize'], 'required'],
+            [['maxFileSize'], 'integer', 'min' => 1],
         ];
     }
 
@@ -69,7 +71,7 @@ class FileSettingsForm extends \yii\base\Model
     public function save()
     {
         $settingsManager = Yii::$app->getModule('file')->settings;
-        $settingsManager->set('maxFileSize', $this->maxFileSize * 1024 * 1024);
+        $settingsManager->set('maxFileSize', (int) $this->maxFileSize * 1024 * 1024);
         $settingsManager->set('excludeMediaFilesPreview', $this->excludeMediaFilesPreview);
         $settingsManager->set('useXSendfile', $this->useXSendfile);
         $settingsManager->set('allowedExtensions', strtolower($this->allowedExtensions));
diff --git a/protected/humhub/modules/admin/views/setting/file.php b/protected/humhub/modules/admin/views/setting/file.php
index 8cb60ba4fd..870ff3a583 100644
--- a/protected/humhub/modules/admin/views/setting/file.php
+++ b/protected/humhub/modules/admin/views/setting/file.php
@@ -18,8 +18,6 @@ $fileModule = Yii::$app->getModule('file');
 
 <?php $form = ActiveForm::begin(['acknowledge' => true]); ?>
 
-<?= $form->errorSummary($model); ?>
-
 <?= $form->field($model, 'maxFileSize')->textInput(['class' => 'form-control', 'readonly' => $fileModule->settings->isFixed('maxFileSize')]); ?>
 <p class="help-block" <?= ($model->maxFileSize > $maxUploadSize) ? 'style="color:' . $this->theme->variable('danger') . ' !important"' : '' ?>>
     <?= Yii::t('AdminModule.settings', 'PHP reported a maximum of {maxUploadSize} MB', ['{maxUploadSize}' => $maxUploadSizeText]); ?>
diff --git a/protected/humhub/modules/search/controllers/SearchController.php b/protected/humhub/modules/search/controllers/SearchController.php
index 65a579966b..29de599fea 100644
--- a/protected/humhub/modules/search/controllers/SearchController.php
+++ b/protected/humhub/modules/search/controllers/SearchController.php
@@ -8,14 +8,13 @@
 
 namespace humhub\modules\search\controllers;
 
-use humhub\modules\user\widgets\Image;
-use Yii;
-use yii\data\Pagination;
 use humhub\components\Controller;
 use humhub\modules\space\models\Space;
 use humhub\modules\user\models\User;
 use humhub\modules\search\models\forms\SearchForm;
 use humhub\modules\search\engine\Search;
+use Yii;
+use yii\data\Pagination;
 
 /**
  * Search Controller provides search functions inside the application.
@@ -43,7 +42,7 @@ class SearchController extends Controller
     {
         $this->appendPageTitle(\Yii::t('SearchModule.base', 'Search'));
         $this->view->setViewContext(static::VIEW_CONTEXT);
-        return parent::init();
+        parent::init();
     }
 
     /**
@@ -74,7 +73,7 @@ class SearchController extends Controller
         $options = [
             'page' => $model->page,
             'sort' => (empty($model->keyword)) ? 'title' : null,
-            'pageSize' => Yii::$app->settings->get('paginationSize'),
+            'pageSize' => $model->pageSize,
             'limitSpaces' => $limitSpaces
         ];
 
diff --git a/protected/humhub/modules/search/engine/Search.php b/protected/humhub/modules/search/engine/Search.php
index 6eb0fff995..510198ab42 100644
--- a/protected/humhub/modules/search/engine/Search.php
+++ b/protected/humhub/modules/search/engine/Search.php
@@ -8,16 +8,16 @@
 
 namespace humhub\modules\search\engine;
 
-use Yii;
-use yii\base\Component;
-use humhub\modules\search\interfaces\Searchable;
 use humhub\modules\content\models\Content;
 use humhub\modules\content\models\ContentTag;
 use humhub\modules\content\components\ContentActiveRecord;
 use humhub\modules\content\components\ContentContainerActiveRecord;
 use humhub\modules\user\models\User;
-use humhub\modules\space\models\Space;
 use humhub\modules\search\events\SearchAttributesEvent;
+use humhub\modules\search\interfaces\Searchable;
+use humhub\modules\search\models\forms\SearchForm;
+use humhub\modules\space\models\Space;
+use yii\base\Component;
 
 /**
  * Description of HSearchComponent
@@ -159,12 +159,12 @@ abstract class Search extends Component
 
     protected function setDefaultFindOptions($options)
     {
-        if (!isset($options['page']) || $options['page'] == '') {
+        if (empty($options['page'])) {
             $options['page'] = 1;
         }
 
-        if (!isset($options['pageSize']) || $options['pageSize'] == '') {
-            $options['pageSize'] = Yii::$app->settings->get('paginationSize');
+        if (empty($options['pageSize'])) {
+            $options['pageSize'] = (new SearchForm())->pageSize;
         }
 
         if (!isset($options['checkPermissions'])) {
diff --git a/protected/humhub/modules/search/models/forms/SearchForm.php b/protected/humhub/modules/search/models/forms/SearchForm.php
index e2efc26ee5..69b3523069 100644
--- a/protected/humhub/modules/search/models/forms/SearchForm.php
+++ b/protected/humhub/modules/search/models/forms/SearchForm.php
@@ -24,13 +24,16 @@ class SearchForm extends Model
     public $keyword = '';
     public $scope = '';
     public $page = 1;
+    public $pageSize;
     public $limitSpaceGuids = [];
 
     public function init()
     {
-        if (Yii::$app->request->get('page')) {
-            $this->page = Yii::$app->request->get('page');
-        }
+        $page = (int) Yii::$app->request->get('page');
+        $this->page = $page < 1 ? 1 : $page;
+
+        $pageSize = (int) Yii::$app->settings->get('paginationSize');
+        $this->pageSize = $pageSize < 1 ? 1 : $pageSize;
     }
 
     /**