diff --git a/src/View/Shortcodes/EmbedShortcodeProvider.php b/src/View/Shortcodes/EmbedShortcodeProvider.php
index e87b31a11..75c3cdb13 100644
--- a/src/View/Shortcodes/EmbedShortcodeProvider.php
+++ b/src/View/Shortcodes/EmbedShortcodeProvider.php
@@ -28,22 +28,6 @@ class EmbedShortcodeProvider implements ShortcodeHandler
 {
     use Configurable;
 
-    /**
-     * A whitelist of shortcode attributes which are allowed in the resultant markup.
-     * Note that the tinymce plugin restricts attributes on the client-side separately.
-     *
-     * @config
-     * @deprecated 4.12.0 Removed without equivalent functionality to replace it
-     */
-    private static array $attribute_whitelist = [
-        'url',
-        'thumbnail',
-        'class',
-        'width',
-        'height',
-        'caption',
-    ];
-
     /**
      * Gets the list of shortcodes provided by this handler
      *
@@ -262,8 +246,17 @@ class EmbedShortcodeProvider implements ShortcodeHandler
      */
     private static function buildAttributeListFromArguments(array $arguments, array $exclude = []): ArrayList
     {
+        // A whitelist of shortcode attributes which are allowed in the resultant markup.
+        // Note that the tinymce plugin restricts attributes on the client-side separately.
+        $whitelist = [
+            'url',
+            'thumbnail',
+            'class',
+            'width',
+            'height',
+            'caption'
+        ];
         // Clean out any empty arguments and anything not whitelisted
-        $whitelist = static::config()->get('attribute_whitelist');
         $arguments = array_filter($arguments, function ($value, $key) use ($whitelist) {
             return in_array($key, $whitelist) && strlen(trim($value ?? ''));
         }, ARRAY_FILTER_USE_BOTH);
diff --git a/tests/php/View/Shortcodes/EmbedShortcodeProviderTest.php b/tests/php/View/Shortcodes/EmbedShortcodeProviderTest.php
index a485793a6..4bd3645f5 100644
--- a/tests/php/View/Shortcodes/EmbedShortcodeProviderTest.php
+++ b/tests/php/View/Shortcodes/EmbedShortcodeProviderTest.php
@@ -217,37 +217,4 @@ class EmbedShortcodeProviderTest extends EmbedUnitTest
             $html
         );
     }
-
-    public function testWhitelistIsConfigurable()
-    {
-        // Allow new whitelisted attribute
-        Config::modify()->merge(EmbedShortcodeProvider::class, 'attribute_whitelist', ['data-some-value']);
-
-        $url = 'https://www.youtube.com/watch?v=dM15HfUYwF0';
-        $html = $this->getShortcodeHtml(
-            $url,
-            $url,
-            <<<EOT
-            <link rel="alternate" type="application/json+oembed" href="https://www.youtube.com/oembed?format=json&amp;url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3Da2tDOYkFCYo" title="The flying car completes first ever inter-city flight (Official Video)">
-            EOT,
-            <<<EOT
-            {"title":"The flying car completes first ever inter-city flight (Official Video)","author_name":"KleinVision","author_url":"https://www.youtube.com/channel/UCCHAHvcO7KSNmgXVRIJLNkw","type":"video","height":113,"width":200,"version":"1.0","provider_name":"YouTube","provider_url":"https://www.youtube.com/","thumbnail_height":360,"thumbnail_width":480,"thumbnail_url":"https://i.ytimg.com/vi/a2tDOYkFCYo/hqdefault.jpg","html":"\u003ciframe width=\u0022200\u0022 height=\u0022113\u0022 src=\u0022https://www.youtube.com/embed/a2tDOYkFCYo?feature=oembed\u0022 frameborder=\u00220\u0022 allow=\u0022accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\u0022 allowfullscreen\u003e\u003c/iframe\u003e"}
-            EOT,
-            [
-                'url' => $url,
-                'caption' => 'A nice video',
-                'width' => 779,
-                'height' => 437,
-                'data-some-value' => 'my-data',
-                'onmouseover' => 'alert(2)',
-                'style' => 'background-color:red;',
-            ],
-        );
-        $this->assertEqualIgnoringWhitespace(
-            <<<EOT
-            <div data-some-value="my-data" style="width:779px;"><iframe width="779" height="437" src="https://www.youtube.com/embed/a2tDOYkFCYo?feature=oembed" frameborder="0" allow="accelerometer;autoplay;clipboard-write;encrypted-media;gyroscope;picture-in-picture" allowfullscreen></iframe><p class="caption">A nice video</p></div>
-            EOT,
-            $html
-        );
-    }
 }