SudoModeVerifyEvent
New in version 12.4.32 / 13.4.13
This event was introduced by the fix for security advisory TYPO3-CORE-SA-2025-013 to address challenges with single sign-on (SSO) providers.
The PSR-14 event
\TYPO3\ is triggered before
a password submitted in sudo-mode verification dialog is verified
for backend user accounts.
This step-up authentication mechanism, introduced as part of the fix for TYPO3-CORE-SA-2025-013, may pose challenges when using remote single sign-on (SSO) systems because they do not support a dedicated verification step.
This event allows developers to change the verification logic of step-up authentication, by conditionally allowing or denying verification based on custom logic — for example, by identifying users authenticated via an SSO system.
See also
- SudoModeRequiredEvent is triggered before showing the sudo-mode verification dialog.
Example: Use an event listener to modify the verification of password in sudo mode
The following demonstrates using the event to statically check the password for an expected hash.
Warning
This example has been simplified for clarity. Always use secure password handling with salted hashing in production. Never hard-code a password hash as shown below.
services:
_defaults:
autowire: true
autoconfigure: true
public: false
Vendor\MyExtension\EventListener\SkipSudoModeDialog:
tags:
- name: event.listener
identifier: 'ext-myextension/skip-sudo-mode-dialog'
Vendor\MyExtension\EventListener\StaticPasswordVerification:
tags:
- name: event.listener
identifier: 'ext-myextension/static-password-verification'
<?php
declare(strict_types=1);
namespace Example\Demo\EventListener;
use TYPO3\CMS\Backend\Security\SudoMode\Event\SudoModeVerifyEvent;
final class StaticPasswordVerification
{
public function __invoke(SudoModeVerifyEvent $event): void
{
$calculatedHash = hash('sha256', $event->getPassword());
// static hash of `dontdothis` - just used as proof-of-concept
// side-note: in production, make use of strong salted password
$expectedHash = '3382f2e21a5471b52a85bc32ab59ab2c467f6e3cb112aef295323874f423994c';
if (hash_equals($expectedHash, $calculatedHash)) {
$event->setVerified(true);
}
}
}
See also: SkipSudoModeDialog example.