diff --git a/core/modules/file/src/Plugin/Field/FieldWidget/FileWidget.php b/core/modules/file/src/Plugin/Field/FieldWidget/FileWidget.php
index 3570c35..944e102 100644
--- a/core/modules/file/src/Plugin/Field/FieldWidget/FileWidget.php
+++ b/core/modules/file/src/Plugin/Field/FieldWidget/FileWidget.php
@@ -47,7 +47,7 @@ public function __construct($plugin_id, $plugin_definition, FieldDefinitionInter
    * {@inheritdoc}
    */
   public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
-    return new static($plugin_id, $plugin_definition,$configuration['field_definition'], $configuration['settings'], $configuration['third_party_settings'], $container->get('element_info'));
+    return new static($plugin_id, $plugin_definition, $configuration['field_definition'], $configuration['settings'], $configuration['third_party_settings'], $container->get('element_info'));
   }
 
   /**
diff --git a/core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php b/core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php
index 82092e6..489c60e 100644
--- a/core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php
+++ b/core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php
@@ -7,11 +7,15 @@
 
 namespace Drupal\image\Plugin\Field\FieldWidget;
 
-use Drupal\Core\Field\FieldItemListInterface;
 use Drupal\Component\Utility\NestedArray;
+use Drupal\Core\Field\FieldDefinitionInterface;
+use Drupal\Core\Field\FieldItemListInterface;
 use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Image\ImageFactory;
+use Drupal\Core\Render\ElementInfoManagerInterface;
 use Drupal\file\Entity\File;
 use Drupal\file\Plugin\Field\FieldWidget\FileWidget;
+use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
  * Plugin implementation of the 'image_image' widget.
@@ -27,6 +31,36 @@
 class ImageWidget extends FileWidget {
 
   /**
+   * The image factory service.
+   *
+   * @var \Drupal\Core\Image\ImageFactory
+   */
+  protected $imageFactory;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, array $third_party_settings, ElementInfoManagerInterface $element_info, ImageFactory $image_factory) {
+    parent::__construct($plugin_id, $plugin_definition, $field_definition, $settings, $third_party_settings, $element_info);
+    $this->imageFactory = $image_factory;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+    return new static(
+      $plugin_id,
+      $plugin_definition,
+      $configuration['field_definition'],
+      $configuration['settings'],
+      $configuration['third_party_settings'],
+      $container->get('element_info'),
+      $container->get('image.factory')
+    );
+  }
+
+  /**
    * {@inheritdoc}
    */
   public static function defaultSettings() {
@@ -121,11 +155,17 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
       $element['#upload_validators']['file_validate_image_resolution'] = array($field_settings['max_resolution'], $field_settings['min_resolution']);
     }
 
-    // If not using custom extension validation, ensure this is an image.
-    $supported_extensions = array('png', 'gif', 'jpg', 'jpeg');
-    $extensions = isset($element['#upload_validators']['file_validate_extensions'][0]) ? $element['#upload_validators']['file_validate_extensions'][0] : implode(' ', $supported_extensions);
-    $extensions = array_intersect(explode(' ', $extensions), $supported_extensions);
-    $element['#upload_validators']['file_validate_extensions'][0] = implode(' ', $extensions);
+    // If using custom extension validation, ensure that the extensions are
+    // supported by the current image toolkit.
+    $supported_extensions = $this->imageFactory->getSupportedExtensions();
+    if (isset($element['#upload_validators']['file_validate_extensions'][0])) {
+      $extensions = $element['#upload_validators']['file_validate_extensions'][0];
+      $extensions = array_intersect(explode(' ', $extensions), $supported_extensions);
+      $element['#upload_validators']['file_validate_extensions'][0] = implode(' ', $extensions);
+    }
+    else {
+      $element['#upload_validators']['file_validate_extensions'][0] = implode(' ', $supported_extensions);
+    }
 
     // Add properties needed by process() method.
     $element['#preview_image_style'] = $this->getSetting('preview_image_style');
diff --git a/core/modules/image/src/Tests/ImageFieldWidgetTest.php b/core/modules/image/src/Tests/ImageFieldWidgetTest.php
index 8bc70bc..252f4f7 100644
--- a/core/modules/image/src/Tests/ImageFieldWidgetTest.php
+++ b/core/modules/image/src/Tests/ImageFieldWidgetTest.php
@@ -7,6 +7,8 @@
 
 namespace Drupal\image\Tests;
 
+use Drupal\field\Entity\FieldConfig;
+
 /**
  * Tests the image field widget.
  *
@@ -30,6 +32,22 @@ public function testWidgetElement() {
     $this->createImageField($field_name, 'article', array(), $field_settings);
     $this->drupalGet('node/add/article');
     $this->assertNotEqual(0, count($this->xpath('//div[contains(@class, "field--widget-image-image")]')), 'Image field widget found on add/node page', 'Browser');
+
+    // Check for allowed image file extensions - default.
+    $this->assertText('Allowed types: png gif jpg jpeg.');
+
+    // Try adding to the field config an unsupported extension, should not
+    // appear in the allowed types.
+    $field_config = FieldConfig::loadByName('node', 'article', $field_name);
+    $field_config ->setSetting('file_extensions', 'png gif jpg jpeg tiff')->save();
+    $this->drupalGet('node/add/article');
+    $this->assertText('Allowed types: png gif jpg jpeg.');
+
+    // Add a supported extension and remove some supported ones, we should see
+    // the intersect of those entered in field config with those supported.
+    $field_config ->setSetting('file_extensions', 'png jpe tiff')->save();
+    $this->drupalGet('node/add/article');
+    $this->assertText('Allowed types: png jpe.');
   }
 
 }
diff --git a/core/modules/system/src/Plugin/ImageToolkit/GDToolkit.php b/core/modules/system/src/Plugin/ImageToolkit/GDToolkit.php
index f9cfb53..e36b60d 100644
--- a/core/modules/system/src/Plugin/ImageToolkit/GDToolkit.php
+++ b/core/modules/system/src/Plugin/ImageToolkit/GDToolkit.php
@@ -398,7 +398,15 @@ public static function isAvailable() {
   public static function getSupportedExtensions() {
     $extensions = array();
     foreach (static::supportedTypes() as $image_type) {
-      $extensions[] = Unicode::strtolower(image_type_to_extension($image_type, FALSE));
+      // @todo Automatically fetch possible extensions for each mime type.
+      // @see https://www.drupal.org/node/2311679
+      $extension = Unicode::strtolower(image_type_to_extension($image_type, FALSE));
+      $extensions[] = $extension;
+      // Add some known similar extensions.
+      if ($extension === 'jpeg') {
+        $extensions[] = 'jpg';
+        $extensions[] = 'jpe';
+      }
     }
     return $extensions;
   }
diff --git a/core/modules/system/src/Tests/Image/ToolkitGdTest.php b/core/modules/system/src/Tests/Image/ToolkitGdTest.php
index a731f5b..ef90e71 100644
--- a/core/modules/system/src/Tests/Image/ToolkitGdTest.php
+++ b/core/modules/system/src/Tests/Image/ToolkitGdTest.php
@@ -111,6 +111,11 @@ function testManipulations() {
     // Test that the image factory is set to use the GD toolkit.
     $this->assertEqual($this->imageFactory->getToolkitId(), 'gd', 'The image factory is set to use the \'gd\' image toolkit.');
 
+    // Test the list of supported extensions.
+    $expected_extensions = ['png', 'gif', 'jpeg', 'jpg', 'jpe'];
+    $supported_extensions = $this->imageFactory->getSupportedExtensions();
+    $this->assertEqual($expected_extensions, array_intersect($expected_extensions, $supported_extensions));
+
     // Typically the corner colors will be unchanged. These colors are in the
     // order of top-left, top-right, bottom-right, bottom-left.
     $default_corners = array($this->red, $this->green, $this->blue, $this->transparent);