diff --git a/src/wp-includes/user.php b/src/wp-includes/user.php
index cb9695cf7b..f2529dccc2 100644
--- a/src/wp-includes/user.php
+++ b/src/wp-includes/user.php
@@ -2140,17 +2140,159 @@ function wp_update_user($userdata) {
 	// Escape data pulled from DB.
 	$user = add_magic_quotes( $user );
 
-	// If password is changing, hash it now.
 	if ( ! empty($userdata['user_pass']) ) {
+		// If password is changing, hash it now
 		$plaintext_pass = $userdata['user_pass'];
-		$userdata['user_pass'] = wp_hash_password($userdata['user_pass']);
+		$userdata['user_pass'] = wp_hash_password( $userdata['user_pass'] );
+		/**
+		 * Filter to stop the sending of the password change email.
+		 *
+		 * @since 4.3
+		 * @see  wp_insert_user() For $user and $userdata fields.
+		 *
+		 * @param bool Return false to not send the email.
+		 * @param array $user The original user array.
+		 * @param array $userdata The updated user array.
+		 *
+		 */
+		$send_pass_change_email = apply_filters( 'send_pass_change_email', true, $user, $userdata );
 	}
 
-	wp_cache_delete($user[ 'user_email' ], 'useremail');
+	if ( $user['user_email'] !== $userdata['user_email'] ) {
+		/**
+		 * Filter to stop the sending of the email change email.
+		 *
+		 * @since 4.3
+		 * @see  wp_insert_user() For $user and $userdata fields.
+		 *
+		 * @param bool Return false to not send the email.
+		 * @param array $user The original user array.
+		 * @param array $userdata The updated user array.
+		 *
+		 */
+		$send_email_change_email = apply_filters( 'send_email_change_email', true, $user, $userdata );
+	}
+
+	wp_cache_delete( $user['user_email'], 'useremail' );
 
 	// Merge old and new fields with new fields overwriting old ones.
-	$userdata = array_merge($user, $userdata);
-	$user_id = wp_insert_user($userdata);
+	$userdata = array_merge( $user, $userdata );
+	$user_id = wp_insert_user( $userdata );
+
+	if ( ! is_wp_error( $user_id ) ) {
+
+		$blog_name = wp_specialchars_decode( get_option( 'blogname' ) );
+
+		if ( ! empty( $send_pass_change_email ) ) {
+
+			/* translators: Do not translate USERNAME, ADMIN_EMAIL, EMAIL, SITENAME, SITEURL: those are placeholders. */
+			$pass_change_text = __( 'Hi ###USERNAME###,
+
+This notice confirms that your password was changed on ###SITENAME###.
+
+If you did not change your password, please contact the Site Administrator at
+###ADMIN_EMAIL###
+
+This email has been sent to ###EMAIL###
+
+Regards,
+All at ###SITENAME###
+###SITEURL###' );
+
+			$pass_change_email = array(
+				'to'      => $user['user_email'],
+				'subject' => __( '[%s] Notice of Password Change' ),
+				'message' => $pass_change_text,
+				'headers' => '',
+			);
+
+			/**
+			 * Filter the email sent when the user's password is changed.
+			 *
+			 * @since 4.3
+			 *
+			 * @param array $pass_change_email {
+			 *            Used to build wp_mail(). https://developer.wordpress.org/reference/functions/wp_mail/
+			 *            @type string $to      The intended recipients. Add emails in a comma separated string.
+			 *            @type string $subject The subject of the email.
+			 *            @type string $message The content of the email.
+			 *                The following strings have a special meaning and will get replaced dynamically:
+			 *                ###USERNAME###    The current user's username.
+			 *                ###ADMIN_EMAIL### The admin email in case this was unexpected.
+			 *                ###EMAIL###       The old email.
+			 *                ###SITENAME###    The name of the site.
+			 *                ###SITEURL###     The URL to the site.
+			 *            @type  string $headers Headers. Add headers in a newline (\r\n) separated string.
+			 *        }
+			 * @param array $user The original user array.
+			 * @param array $userdata The updated user array.
+			 *
+			 */
+			$pass_change_email = apply_filters( 'password_change_email', $pass_change_email, $user, $userdata );
+
+			$pass_change_email['message'] = str_replace( '###USERNAME###', $user['user_login'], $pass_change_email['message'] );
+			$pass_change_email['message'] = str_replace( '###ADMIN_EMAIL###', get_option( 'admin_email' ), $pass_change_email['message'] );
+			$pass_change_email['message'] = str_replace( '###EMAIL###', $user['user_email'], $pass_change_email['message'] );
+			$pass_change_email['message'] = str_replace( '###SITENAME###', get_option( 'blogname' ), $pass_change_email['message'] );
+			$pass_change_email['message'] = str_replace( '###SITEURL###', get_option( 'siteurl' ), $pass_change_email['message'] );
+
+			wp_mail( $pass_change_email['to'], sprintf( $pass_change_email['subject'], $blog_name ), $pass_change_email['message'], $pass_change_email['headers'] );
+		}
+
+		if ( ! empty( $send_email_change_email ) ) {
+			/* translators: Do not translate USERNAME, ADMIN_EMAIL, EMAIL, SITENAME, SITEURL: those are placeholders. */
+			$email_change_text = __( 'Hi ###USERNAME###,
+
+This notice confirms that your email was changed on ###SITENAME###.
+
+If you did not change your email, please contact the Site Administrator at
+###ADMIN_EMAIL###
+
+This email has been sent to ###EMAIL###
+
+Regards,
+All at ###SITENAME###
+###SITEURL###' );
+
+			$email_change_email = array(
+				'to'      => $user['user_email'],
+				'subject' => __( '[%s] Notice of Email Change' ),
+				'message' => $email_change_text,
+				'headers' => '',
+			);
+
+			/**
+			 * Filter the email sent when the user's password is changed.
+			 *
+			 * @since 4.3
+			 *
+			 * @param array $email_change_email {
+			 *            Used to build wp_mail(). https://developer.wordpress.org/reference/functions/wp_mail/
+			 *            @type string $to      The intended recipients.
+			 *            @type string $subject The subject of the email.
+			 *            @type string $message The content of the email.
+			 *                The following strings have a special meaning and will get replaced dynamically:
+			 *                ###USERNAME###    The current user's username.
+			 *                ###ADMIN_EMAIL### The admin email in case this was unexpected.
+			 *                ###EMAIL###       The old email.
+			 *                ###SITENAME###    The name of the site.
+			 *                ###SITEURL###     The URL to the site.
+			 *            @type string $headers Headers.
+			 *        }
+			 * @param array $user The original user array.
+			 * @param array $userdata The updated user array.
+			 */
+			$email_change_email = apply_filters( 'email_change_email', $email_change_email, $user, $userdata );
+
+			$email_change_email['message'] = str_replace( '###USERNAME###', $user['user_login'], $email_change_email['message'] );
+			$email_change_email['message'] = str_replace( '###ADMIN_EMAIL###', get_option( 'admin_email' ), $email_change_email['message'] );
+			$email_change_email['message'] = str_replace( '###EMAIL###', $user['user_email'], $email_change_email['message'] );
+			$email_change_email['message'] = str_replace( '###SITENAME###', get_option( 'blogname' ), $email_change_email['message'] );
+			$email_change_email['message'] = str_replace( '###SITEURL###', get_option( 'siteurl' ), $email_change_email['message'] );
+
+			wp_mail( $email_change_email['to'], sprintf( $email_change_email['subject'], $blog_name ), $email_change_email['message'], $email_change_email['headers'] );
+		}
+	}
 
 	// Update the cookies if the password changed.
 	$current_user = wp_get_current_user();