Ticket #43968: 43968-with-filter.diff

src/wp-includes/user.php

@@ -3141 +3141 @@
         $content = str_replace( '###SITENAME###', wp_specialchars_decode( $email_data['sitename'], ENT_QUOTES ), $content );
         $content = str_replace( '###SITEURL###', esc_url_raw( $email_data['siteurl'] ), $content );
 
+        $subject = sprintf(
+                /**
+                 * Filters the subject of the email sent when an account action is attempted.
+                 *
+                 * @since 4.9.6
+                 *
+                 * @param string $subject    The email subject.
+                 * @param array  $email_data {
+                 *     Data relating to the account action email.
+                 *
+                 *     @type WP_User_Request $request User request object.
+                 *     @type string          $email       The email address this is being sent to.
+                 *     @type string          $description Description of the action being performed so the user knows what the email is for.
+                 *     @type string          $confirm_url The link to click on to confirm the account action.
+                 *     @type string          $sitename    The site name sending the mail.
+                 *     @type string          $siteurl     The site URL sending the mail.
+                 * }
+                 */
+                apply_filters(
+                        'user_request_action_email_subject',
+                        /* translators: Privacy data request subject. 1: Site name, 2: Name of the action */
+                        __( '[%1$s] Confirm Action: %2$s' ),
+                        $email_data
+                ),
+                wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES ),
+                $email_data['description']
+        );
+
         /* translators: %s Site name. */
-        return wp_mail( $email_data['email'], sprintf( __( '[%s] Confirm Action' ), wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES ) ), $content );
+        return wp_mail( $email_data['email'], $subject, $content );
 }
 
 /**