diff --git a/core/lib/Drupal/Core/Form/FormBuilder.php b/core/lib/Drupal/Core/Form/FormBuilder.php
index be0a22f456f8a9db363f5743bf3caf18572faded..d00b4cc4563446efb8f503429f9930cf3e76eab9 100644
--- a/core/lib/Drupal/Core/Form/FormBuilder.php
+++ b/core/lib/Drupal/Core/Form/FormBuilder.php
@@ -570,6 +570,18 @@ public function processForm($form_id, &$form, FormStateInterface &$form_state) {
     $unprocessed_form = $form;
     $form = $this->doBuildForm($form_id, $form, $form_state);
 
+    // Allow an Ajax callback while the form is operating in GET mode. For
+    // example, when using HOOK_form_views_exposed_form_alter.
+    if ($form_state->isMethodType('get')) {
+      $triggering_element_name = $this->requestStack->getCurrentRequest()->request->get('_triggering_element_name');
+      $triggering_element = $form_state->getTriggeringElement();
+      if (isset($triggering_element['#name'])
+        && $triggering_element['#name'] == $triggering_element_name
+        && isset($triggering_element['#ajax'])) {
+        throw new FormAjaxException($form, $form_state);
+      }
+    }
+
     // Only process the input if we have a correct form submission.
     if ($form_state->isProcessingInput()) {
       // Form values for programmed form submissions typically do not include a
diff --git a/core/modules/views/src/ViewExecutable.php b/core/modules/views/src/ViewExecutable.php
index 87739a90c96c9381a6b6936abafdcb39336c9e95..70658d6eb0a5d8904e54b79eab844f2f0b0dac85 100644
--- a/core/modules/views/src/ViewExecutable.php
+++ b/core/modules/views/src/ViewExecutable.php
@@ -745,6 +745,43 @@ public function getExposedInput() {
       $this->initDisplay();
 
       $this->exposed_input = $this->request->query->all();
+      // Allow AJAX requests on exposed filters.
+      if ($this->request->isMethod('post') && $this->request->request->get('_triggering_element_name')) {
+        $post_form_data = $this->request->request->all();
+        $exposed_field_names = [];
+        // Go through each handler and let it generate its exposed widget.
+        foreach ($this->display_handler->handlers as $type => $value) {
+          /** @var \Drupal\views\Plugin\views\ViewsHandlerInterface $handler */
+          foreach ($this->$type as $handler) {
+            if ($handler->canExpose() && $handler->isExposed()) {
+              // Pick up POST data for all the exposed handlers.
+              if (!empty($handler->options['expose']['use_operator']) && !empty($handler->options['expose']['operator_id'])) {
+                $exposed_field_names[] = $handler->options['expose']['operator_id'];
+              }
+              if (!empty($handler->options['expose']['identifier'])) {
+                if ($handler->isAGroup()) {
+                  $exposed_field_names[] = $handler->options['group_info']['identifier'];
+                }
+                else {
+                  $exposed_field_names[] = $handler->options['expose']['identifier'];
+                }
+              }
+            }
+          }
+        }
+        foreach ($exposed_field_names as $exposed_field_name) {
+          foreach ($post_form_data as $post_form_key => $post_form_value) {
+            if ($post_form_key === $exposed_field_name || str_starts_with($post_form_key, "{$exposed_field_name}_")) {
+              // Pick up the exposed field and any extra variations starting
+              // with the same field name.
+              $this->exposed_input += [
+                $post_form_key => $post_form_value,
+              ];
+            }
+          }
+        }
+      }
+
       // Unset items that are definitely not our input:
       foreach (['page', 'q'] as $key) {
         if (isset($this->exposed_input[$key])) {
diff --git a/core/modules/views/tests/modules/views_test_exposed_filter/views_test_exposed_filter.info.yml b/core/modules/views/tests/modules/views_test_exposed_filter/views_test_exposed_filter.info.yml
new file mode 100644
index 0000000000000000000000000000000000000000..965b6a8d347bcc59b40a3754e86faf9a96aa79c0
--- /dev/null
+++ b/core/modules/views/tests/modules/views_test_exposed_filter/views_test_exposed_filter.info.yml
@@ -0,0 +1,7 @@
+name: 'Views Test Exposed Filter'
+type: module
+description: 'Alters Views exposed filter form for testing AJAX callbacks.'
+package: Testing
+version: VERSION
+dependencies:
+  - drupal:views
diff --git a/core/modules/views/tests/modules/views_test_exposed_filter/views_test_exposed_filter.module b/core/modules/views/tests/modules/views_test_exposed_filter/views_test_exposed_filter.module
new file mode 100644
index 0000000000000000000000000000000000000000..39ef041d7a790acb94e58d594392e817ee3c8264
--- /dev/null
+++ b/core/modules/views/tests/modules/views_test_exposed_filter/views_test_exposed_filter.module
@@ -0,0 +1,36 @@
+<?php
+
+/**
+ * @file
+ * Contains the "views_test_exposed_filter" module hooks and callbacks.
+ */
+
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Implements hook_form_FORM_ID_alter().
+ */
+function views_test_exposed_filter_form_views_exposed_form_alter(&$form, FormStateInterface $form_state): void {
+  if (isset($form['title'])) {
+    $form['title']['#ajax']['callback'] = 'views_test_exposed_filter_ajax_callback';
+    $form['title']['#ajax']['wrapper'] = 'views-test-exposed-filter-test';
+    $form['title']['#prefix'] = '<span id="views-test-exposed-filter-test">Default prefix</span>';
+  }
+}
+
+/**
+ * Returns render array via an AJAX callback for testing.
+ *
+ * @param array $form
+ *   The form definition array.
+ * @param \Drupal\Core\Form\FormStateInterface $form_state
+ *   The form state object.
+ *
+ * @return array
+ *   Render array to display when the AJAX callback is triggered.
+ */
+function views_test_exposed_filter_ajax_callback(array &$form, FormStateInterface $form_state): array {
+  return [
+    '#markup' => 'Callback called.',
+  ];
+}
diff --git a/core/modules/views/tests/src/FunctionalJavascript/ExposedFilterAJAXTest.php b/core/modules/views/tests/src/FunctionalJavascript/ExposedFilterAJAXTest.php
index 6d61ecef80a0757ca90b2ddd80de2be5ba70678f..782c03bd694d4e5ff676275b4bdff2c61a48c396 100644
--- a/core/modules/views/tests/src/FunctionalJavascript/ExposedFilterAJAXTest.php
+++ b/core/modules/views/tests/src/FunctionalJavascript/ExposedFilterAJAXTest.php
@@ -27,6 +27,7 @@ class ExposedFilterAJAXTest extends WebDriverTestBase {
     'views',
     'views_test_modal',
     'user_test_views',
+    'views_test_config',
   ];
 
   /**
@@ -39,7 +40,7 @@ class ExposedFilterAJAXTest extends WebDriverTestBase {
    *
    * @var array
    */
-  public static $testViews = ['test_user_name'];
+  public static $testViews = ['test_user_name', 'test_content_ajax'];
 
   /**
    * {@inheritdoc}
@@ -258,4 +259,31 @@ public function testExposedFilterErrorMessages(): void {
     $this->assertSession()->pageTextContainsOnce(sprintf('There are no users matching "%s"', $name));
   }
 
+  /**
+   * Tests if Ajax events can be attached to the exposed filter form.
+   */
+  public function testExposedFilterAjaxCallback(): void {
+    ViewTestData::createTestViews(self::class, ['views_test_config']);
+
+    // Attach an Ajax event to all 'title' fields in the exposed filter form.
+    \Drupal::service('module_installer')->install(['views_test_exposed_filter']);
+    $this->resetAll();
+    $this->rebuildContainer();
+    $this->container->get('module_handler')->reload();
+
+    $this->drupalGet('test-content-ajax');
+
+    $page = $this->getSession()->getPage();
+    $this->assertSession()->pageTextContains('Default prefix');
+
+    $page->fillField('title', 'value');
+
+    // Simulate a click outside the title field so the title field ajax callback
+    // kicks in. It does not matter here what action is carried out here.
+    $page->selectFieldOption('status', 'Published');
+    $this->assertSession()->assertWaitOnAjaxRequest();
+
+    $this->assertSession()->pageTextContains('Callback called.');
+  }
+
 }