diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index 55f26fc717..4594690f1a 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -21,6 +21,7 @@ Yii Framework 2 Change Log
 - Bug #17299: Fixed adding of input error class in `\yii\widgets\ActiveField::widget` (alexkart)
 - Bug #17328: Added mime aliases for BMP and SVG files (cmoeke)
 - Bug #17336: Fixed wildcard matching in Event::hasHandlers() (samdark)
+- Bug #12080: Fixed afterValidate triggering when any validation occurs (czzplnm)
 
 
 2.0.19 May 21, 2019
diff --git a/framework/assets/yii.activeForm.js b/framework/assets/yii.activeForm.js
index 3b416c0469..e4c3962e8d 100644
--- a/framework/assets/yii.activeForm.js
+++ b/framework/assets/yii.activeForm.js
@@ -459,9 +459,9 @@
                         $errorElement = data.settings.validationStateOn === 'input' ? $input : $container;
 
                     $errorElement.removeClass(
-                        data.settings.validatingCssClass + ' ' +
-                            data.settings.errorCssClass + ' ' +
-                            data.settings.successCssClass
+                      data.settings.validatingCssClass + ' ' +
+                      data.settings.errorCssClass + ' ' +
+                      data.settings.successCssClass
                     );
                     $container.find(this.error).html('');
                 });
@@ -705,19 +705,20 @@
             return false;
         }
 
+        var errorAttributes = [];
+        var $input = findInput($form, this);
+        $.each(data.attributes, function () {
+            var hasError = (submitting && updateInput($form, this, messages)) || (!submitting && attrHasError($form, this, messages));
+
+            if (!$input.is(":disabled") && !this.cancelled && hasError) {
+                errorAttributes.push(this);
+            }
+        });
+
+        $form.trigger(events.afterValidate, [messages, errorAttributes]);
+
         if (submitting) {
-            var errorAttributes = [], $input;
-            $.each(data.attributes, function () {
-                $input = findInput($form, this);
-                if (!$input.is(":disabled") && !this.cancelled && updateInput($form, this, messages)) {
-                    errorAttributes.push(this);
-                }
-            });
-
-            $form.trigger(events.afterValidate, [messages, errorAttributes]);
-
             updateSummary($form, messages);
-
             if (errorAttributes.length) {
                 if (data.settings.scrollToError) {
                     var top = $form.find($.map(errorAttributes, function(attribute) {
@@ -787,7 +788,7 @@
     var updateInput = function ($form, attribute, messages) {
         var data = $form.data('yiiActiveForm'),
             $input = findInput($form, attribute),
-            hasError = false;
+            hasError = attrHasError($form, attribute, messages);
 
         if (!$.isArray(messages[attribute.id])) {
             messages[attribute.id] = [];
@@ -795,7 +796,6 @@
 
         attribute.status = 1;
         if ($input.length) {
-            hasError = messages[attribute.id].length > 0;
             var $container = $form.find(attribute.container);
             var $error = $container.find(attribute.error);
             updateAriaInvalid($form, attribute, hasError);
@@ -809,11 +809,11 @@
                     $error.html(messages[attribute.id][0]);
                 }
                 $errorElement.removeClass(data.settings.validatingCssClass + ' ' + data.settings.successCssClass)
-                    .addClass(data.settings.errorCssClass);
+                  .addClass(data.settings.errorCssClass);
             } else {
                 $error.empty();
                 $errorElement.removeClass(data.settings.validatingCssClass + ' ' + data.settings.errorCssClass + ' ')
-                    .addClass(data.settings.successCssClass);
+                  .addClass(data.settings.successCssClass);
             }
             attribute.value = getValue($form, attribute);
         }
@@ -823,6 +823,28 @@
         return hasError;
     };
 
+    /**
+     * Checks if a particular attribute has an error
+     * @param $form the form jQuery object
+     * @param attribute object the configuration for a particular attribute.
+     * @param messages array the validation error messages
+     * @return boolean whether there is a validation error for the specified attribute
+     */
+    var attrHasError = function ($form, attribute, messages) {
+        var $input = findInput($form, attribute),
+            hasError = false;
+
+        if (!$.isArray(messages[attribute.id])) {
+            messages[attribute.id] = [];
+        }
+
+        if ($input.length) {
+            hasError = messages[attribute.id].length > 0;
+        }
+
+        return hasError;
+    };
+
     /**
      * Updates the error summary.
      * @param $form the form jQuery object
diff --git a/tests/js/tests/yii.activeForm.test.js b/tests/js/tests/yii.activeForm.test.js
index 23733a5366..323b74ab1f 100644
--- a/tests/js/tests/yii.activeForm.test.js
+++ b/tests/js/tests/yii.activeForm.test.js
@@ -78,7 +78,7 @@ describe('yii.activeForm', function () {
                 assert.isTrue(afterValidateSpy.calledOnce);
             });
         });
-        
+
         describe('with disabled fields', function () {
             var inputTypes = {
                 test_radio: 'radioList',
@@ -184,5 +184,38 @@ describe('yii.activeForm', function () {
                 assert.equal('New value', eventData.value);
             });
         });
+
+        describe('afterValidate', function () {
+            var afterValidateSpy;
+            var eventData = null;
+
+            before(function () {
+                afterValidateSpy = sinon.spy(function (event, data) {
+                    eventData = data;
+                });
+            });
+
+            after(function () {
+                afterValidateSpy.reset();
+            });
+
+            // https://github.com/yiisoft/yii2/issues/12080
+
+            it('afterValidate should trigger when not submitting', function () {
+                var inputId = 'name',
+                    $input = $('#' + inputId);
+
+                $activeForm = $('#w0');
+              $activeForm.yiiActiveForm(
+                [{
+                  "id": inputId,
+                  "name": "name",
+                  input: '#' + inputId
+                }], []).on('afterValidate', afterValidateSpy);
+
+                $activeForm.yiiActiveForm('validate');
+                assert.notEqual(null, eventData);
+            });
+        });
     });
 });