diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 3d90183d..c83ba32f 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -1,9 +1,10 @@
 Changelog
 =========
 
-Unreleased
+1.10.4 (Unreleased)
 ---------------------
 - Fix #328: Missing Iframe attributes in snippet
+- Fix #333: Fix saving of iframe URL by space admin
 
 1.10.3 (May 15, 2024)
 ---------------------
diff --git a/models/CustomContentContainer.php b/models/CustomContentContainer.php
index 758170e9..fd88778e 100644
--- a/models/CustomContentContainer.php
+++ b/models/CustomContentContainer.php
@@ -23,15 +23,15 @@
  * Note: Subclasses may container global types not bound to any ContentContainerActiveRecord
  *
  * The followings are the available columns in table 'custom_pages_page':
- * @property integer $id
- * @property integer $type
+ * @property int $id
+ * @property int $type
  * @property string $title
  * @property string $icon
  * @property string $page_content
  * @property string $iframe_attrs
- * @property integer $sort_order
- * @property integer $admin_only
- * @property integer $in_new_window
+ * @property int $sort_order
+ * @property int $admin_only
+ * @property int $in_new_window
  * @property string $target
  * @property string $cssClass
  * @property string $url
@@ -41,9 +41,9 @@ abstract class CustomContentContainer extends ContentActiveRecord
     use PhpPageContainer;
     use TemplatePageContainer;
 
-    const VISIBILITY_ADMIN_ONLY = 3;
-    const VISIBILITY_PRIVATE = 0;
-    const VISIBILITY_PUBLIC = 1;
+    public const VISIBILITY_ADMIN_ONLY = 3;
+    public const VISIBILITY_PRIVATE = 0;
+    public const VISIBILITY_PUBLIC = 1;
 
     /**
      * @inheritdoc
@@ -56,7 +56,7 @@ abstract class CustomContentContainer extends ContentActiveRecord
     private $_target;
 
     /**
-     * @var integer special field for template based pages specifying the layout template id
+     * @var int special field for template based pages specifying the layout template id
      */
     public $templateId;
 
@@ -71,7 +71,7 @@ public function afterFind()
 
         if ($this->admin_only) {
             $this->visibility = static::VISIBILITY_ADMIN_ONLY;
-        } else if ($this->content->isPublic()) {
+        } elseif ($this->content->isPublic()) {
             $this->visibility = static::VISIBILITY_PUBLIC;
         } else {
             $this->visibility = static::VISIBILITY_PRIVATE;
@@ -81,7 +81,7 @@ public function afterFind()
     /**
      * Returns the database content field. Note this does not render the any content.
      */
-    public abstract function getPageContent();
+    abstract public function getPageContent();
 
     /**
      * Returns the database content field. Note this does not render the any content.
@@ -94,29 +94,29 @@ public function getPageContentProperty()
     /**
      * Returns all allowed templates for a page container class.
      */
-    public abstract function getAllowedTemplateSelection();
+    abstract public function getAllowedTemplateSelection();
 
     /**
      * Returns the page container class label.
      * @return string
      */
-    public abstract function getLabel();
+    abstract public function getLabel();
 
     /**
      * Returns the view file path for PHP based content.
      * @return string
      */
-    public abstract function getPhpViewPath();
+    abstract public function getPhpViewPath();
 
     /**
      * @return string
      */
-    public abstract function getEditUrl();
+    abstract public function getEditUrl();
 
     /**
      * @return string
      */
-    public abstract function getPageType();
+    abstract public function getPageType();
 
     /**
      * @return array
@@ -124,7 +124,7 @@ public abstract function getPageType();
     public function getVisibilitySelection()
     {
         $result = [
-            static::VISIBILITY_ADMIN_ONLY => Yii::t('CustomPagesModule.visibility', 'Admin only')
+            static::VISIBILITY_ADMIN_ONLY => Yii::t('CustomPagesModule.visibility', 'Admin only'),
         ];
 
         if ($this->isGuestAccessEnabled()) {
@@ -142,7 +142,7 @@ public function getVisibilitySelection()
     /**
      * Helper function can be replaced with AuthHelper::isGuestAccessEnabled() after min-version 1.4
      *
-     * @return boolean
+     * @return bool
      */
     protected function isGuestAccessEnabled()
     {
@@ -174,7 +174,7 @@ public function defaultAttributeLabels()
             'targetUrl' => Yii::t('CustomPagesModule.components_Container', 'Target Url'),
             'templateId' => Yii::t('CustomPagesModule.components_Container', 'Template Layout'),
             'admin_only' => Yii::t('CustomPagesModule.models_Page', 'Only visible for admins'),
-            'visibility' => Yii::t('CustomPagesModule.models_Page', 'Visibility')
+            'visibility' => Yii::t('CustomPagesModule.models_Page', 'Visibility'),
         ];
     }
 
@@ -241,7 +241,11 @@ private function getRulesByContentType()
             return $result;
         }
 
-        if (PhpType::isType($type) || LinkType::isType($type) || HtmlType::isType($type) || MarkdownType::isType($type) || IframeType::isType($type)) {
+        if (PhpType::isType($type) ||
+            LinkType::isType($type) ||
+            HtmlType::isType($type) ||
+            MarkdownType::isType($type) ||
+            (IframeType::isType($type) && Yii::$app->user->isAdmin())) {
             $result[] = ['page_content', 'required'];
         }
 
diff --git a/models/IframeType.php b/models/IframeType.php
index 2f30fd77..f64ce8fb 100644
--- a/models/IframeType.php
+++ b/models/IframeType.php
@@ -8,29 +8,26 @@
 
 namespace humhub\modules\custom_pages\models;
 
-
 use Yii;
 use yii\widgets\ActiveForm;
 
 class IframeType extends ContentType
 {
-
-    const ID = 3;
+    public const ID = 3;
 
     protected $hasContent = false;
 
-
-    function getId()
+    public function getId()
     {
         return static::ID;
     }
 
-    function getLabel()
+    public function getLabel()
     {
         return Yii::t('CustomPagesModule.base', 'Iframe');
     }
 
-    function getDescription()
+    public function getDescription()
     {
         return Yii::t('CustomPagesModule.base', 'Will embed the the result of a given url as an iframe element.');
     }
@@ -47,18 +44,19 @@ public function getViewName()
 
     public function renderFormField(ActiveForm $form, CustomContentContainer $page)
     {
-        $targetUrlField = $form->field($page, $page->getPageContentProperty())->label($page->getAttributeLabel('targetUrl'));
-        if ($page->iframe_attrs && !Yii::$app->user->isAdmin()) {
-            $formField = $targetUrlField->textInput(['class' => 'form-control', 'disabled' => 'disabled'])->hint(Yii::t('CustomPagesModule.views_common_edit', 'You need to be a system administrator to edit this URL'));
-        } else {
-            $formField = $targetUrlField->textInput(['class' => 'form-control'])->hint(Yii::t('CustomPagesModule.views_common_edit', 'e.g. http://www.example.de'));
-        }
+        $targetUrlField = $form->field($page, $page->getPageContentProperty())
+            ->label($page->getAttributeLabel('targetUrl'));
 
         if (Yii::$app->user->isAdmin()) {
-            $formField .=
-                $form->field($page, 'iframe_attrs')->textInput(['class' => 'form-control'])->hint(Yii::t('CustomPagesModule.views_common_edit', 'e.g. allowfullscreen allow="camera; microphone"'));
+            $formField = $targetUrlField
+                ->hint(Yii::t('CustomPagesModule.views_common_edit', 'e.g. http://www.example.de'));
+            $formField .= $form->field($page, 'iframe_attrs')
+                ->hint(Yii::t('CustomPagesModule.views_common_edit', 'e.g. allowfullscreen allow="camera; microphone"'));
+        } else {
+            $formField = $targetUrlField->textInput(['disabled' => 'disabled'])
+                ->hint(Yii::t('CustomPagesModule.views_common_edit', 'You need to be a system administrator to edit this URL'));
         }
 
         return $formField;
     }
-}
\ No newline at end of file
+}
diff --git a/module.json b/module.json
index d796c995..002ad690 100644
--- a/module.json
+++ b/module.json
@@ -3,7 +3,7 @@
     "name": "Custom Pages",
     "description": "Create custom pages and widgets and share them with your users. Take advantage of a wide range of editing options, including HTML and Markdown.",
     "keywords": ["pages", "custom", "iframe", "markdown", "link", "navigation", "spaces"],
-    "version": "1.10.3",
+    "version": "1.10.4",
     "homepage": "https://github.com/humhub/custom-pages",
     "humhub": {
         "minVersion": "1.14"