some big beautiful update

application/Espo/Classes/FieldValidators/Common/Host/NotInternal.php

@@ -0,0 +1,62 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2026 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators\Common\Host;
+
+use Espo\Core\FieldValidation\Validator;
+use Espo\Core\FieldValidation\Validator\Data;
+use Espo\Core\FieldValidation\Validator\Failure;
+use Espo\Core\Utils\Security\HostCheck;
+use Espo\ORM\Entity;
+
+/**
+ * @implements Validator<Entity>
+ * @since 9.3.2
+ */
+class NotInternal implements Validator
+{
+    public function __construct(
+        private HostCheck $hostCheck,
+    ) {}
+
+    public function validate(Entity $entity, string $field, Data $data): ?Failure
+    {
+        $value = $entity->get($field);
+
+        if (!$value) {
+            return null;
+        }
+
+        if (!$this->hostCheck->isNotInternalHost($value)) {
+            return Failure::create();
+        }
+
+        return null;
+    }
+}

application/Espo/Classes/FieldValidators/Webhook/Url/NotInternal.php

@@ -0,0 +1,71 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2026 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators\Webhook\Url;
+
+use Espo\Core\FieldValidation\Validator;
+use Espo\Core\FieldValidation\Validator\Data;
+use Espo\Core\FieldValidation\Validator\Failure;
+use Espo\Core\Utils\Security\UrlCheck;
+use Espo\Core\Webhook\AddressUtil;
+use Espo\ORM\Entity;
+
+/**
+ * @implements Validator<Entity>
+ */
+class NotInternal implements Validator
+{
+    public function __construct(
+        private UrlCheck $urlCheck,
+        private AddressUtil $addressUtil,
+    ) {}
+
+    public function validate(Entity $entity, string $field, Data $data): ?Failure
+    {
+        $value = $entity->get($field);
+
+        if (!$value) {
+            return null;
+        }
+
+        if (!$this->urlCheck->isUrl($value)) {
+            return null;
+        }
+
+        if ($this->addressUtil->isAllowedUrl($value)) {
+            return null;
+        }
+
+        if (!$this->urlCheck->isNotInternalUrl($value)) {
+            return Failure::create();
+        }
+
+        return null;
+    }
+}

application/Espo/Classes/RecordHooks/EmailAccount/BeforeSaveValidateHosts.php

@@ -0,0 +1,120 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2026 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\RecordHooks\EmailAccount;
+
+use Espo\Core\Exceptions\Forbidden;
+use Espo\Core\Record\Hook\SaveHook;
+use Espo\Core\Utils\Config;
+use Espo\Core\Utils\Security\HostCheck;
+use Espo\Entities\EmailAccount;
+use Espo\Entities\InboundEmail;
+use Espo\ORM\Entity;
+
+/**
+ * @implements SaveHook<EmailAccount|InboundEmail>
+ */
+class BeforeSaveValidateHosts implements SaveHook
+{
+    public function __construct(
+        private Config $config,
+        private HostCheck $hostCheck,
+    ) {}
+
+    public function process(Entity $entity): void
+    {
+        if ($entity->isAttributeChanged('host') || $entity->isAttributeChanged('port')) {
+            $this->validateImap($entity);
+        }
+
+        if ($entity->isAttributeChanged('smtpHost') || $entity->isAttributeChanged('smtpPort')) {
+            $this->validateSmtp($entity);
+        }
+    }
+
+    /**
+     * @throws Forbidden
+     */
+    private function validateImap(EmailAccount|InboundEmail $entity): void
+    {
+        $host = $entity->getHost();
+        $port = $entity->getPort();
+
+        if ($host === null || $port === null) {
+            return;
+        }
+
+        $address = $host . ':' . $port;
+
+        if (in_array($address, $this->getAllowedAddressList())) {
+            return;
+        }
+
+        if (!$this->hostCheck->isNotInternalHost($host)) {
+            $message = $this->composeErrorMessage($host, $address);
+
+            throw new Forbidden($message);
+        }
+    }
+
+    /**
+     * @throws Forbidden
+     */
+    private function validateSmtp(EmailAccount|InboundEmail $entity): void
+    {
+        $host = $entity->getSmtpHost();
+        $port = $entity->getSmtpPort();
+
+        if ($host === null || $port === null) {
+            return;
+        }
+
+        $address = $host . ':' . $port;
+
+        if (!$this->hostCheck->isNotInternalHost($host)) {
+            $message = $this->composeErrorMessage($host, $address);
+
+            throw new Forbidden($message);
+        }
+    }
+
+    /**
+     * @return string[]
+     */
+    private function getAllowedAddressList(): array
+    {
+        return $this->config->get('emailServerAllowedAddressList') ?? [];
+    }
+
+    private function composeErrorMessage(string $host, string $address): string
+    {
+        return "Host '$host' is not allowed as it's internal. " .
+            "To allow, add `$address` to the config parameter `emailServerAllowedAddressList`.";
+    }
+}