MDVA-43443_EE_2.4.2-p2_magento-module-email.patch

diff --git a/Model/Template/Filter.php b/Model/Template/Filter.php
index 88b204307f2..52b1018e1af 100644
--- a/Model/Template/Filter.php
+++ b/Model/Template/Filter.php
@@ -379,14 +379,14 @@ class Filter extends \Magento\Framework\Filter\Template
     }

     /**
-     * Retrieve Block html directive
-     *
      * @param array $construction
+     *
      * @return string
+     *
      * @SuppressWarnings(PHPMD.CyclomaticComplexity)
      * @SuppressWarnings(PHPMD.NPathComplexity)
      */
-    public function blockDirective($construction)
+    private function resolveBlockDirective($construction)
     {
         $skipParams = ['class', 'id', 'output'];
         $blockParameters = $this->getParameters($construction[2]);
@@ -427,12 +427,26 @@ class Filter extends \Magento\Framework\Filter\Template
     }

     /**
-     * Retrieve layout html directive
+     * Retrieve Block html directive
      *
+     * @param array $construction
+     * @return string
+     * @SuppressWarnings(PHPMD.CyclomaticComplexity)
+     * @SuppressWarnings(PHPMD.NPathComplexity)
+     */
+    public function blockDirective($construction)
+    {
+        $result = $this->resolveBlockDirective($construction);
+
+        return preg_replace("/{{/", "{{", $result);
+    }
+
+    /**
      * @param string[] $construction
+     *
      * @return string
      */
-    public function layoutDirective($construction)
+    private function resolveLayoutDirective($construction)
     {
         $this->_directiveParams = $this->getParameters($construction[2]);
         if (!isset($this->_directiveParams['area'])) {
@@ -448,6 +462,19 @@ class Filter extends \Magento\Framework\Filter\Template
         }
     }

+    /**
+     * Retrieve layout html directive
+     *
+     * @param string[] $construction
+     * @return string
+     */
+    public function layoutDirective($construction)
+    {
+        $result = $this->resolveLayoutDirective($construction);
+
+        return preg_replace("/{{/", "{{", $result);
+    }
+
     /**
      * Retrieve layout html directive callback
      *
@@ -515,7 +542,7 @@ class Filter extends \Magento\Framework\Filter\Template
     {
         $params = $this->getParameters($construction[2]);
         $url = $this->_assetRepo->getUrlWithParams($params['url'], $params);
-        return $url;
+        return $this->sanitizeValue($url);
     }

     /**
@@ -528,8 +555,11 @@ class Filter extends \Magento\Framework\Filter\Template
     {
         // phpcs:disable Magento2.Functions.DiscouragedFunction
         $params = $this->getParameters(html_entity_decode($construction[2], ENT_QUOTES));
-        return $this->_storeManager->getStore()
-            ->getBaseUrl(\Magento\Framework\UrlInterface::URL_TYPE_MEDIA) . $params['url'];
+        return $this->sanitizeValue(
+            $this->_storeManager->getStore()
+                ->getBaseUrl(\Magento\Framework\UrlInterface::URL_TYPE_MEDIA) . $params['url']
+        );
+
     }

     /**
@@ -567,7 +597,7 @@ class Filter extends \Magento\Framework\Filter\Template
             unset($params['url']);
         }

-        return $this->urlModel->getUrl($path, $params);
+        return $this->sanitizeValue($this->urlModel->getUrl($path, $params));
     }

     /**
@@ -606,12 +636,7 @@ class Filter extends \Magento\Framework\Filter\Template

         $text = __($text, $params)->render();

-        $pattern = '/{{.*?}}/';
-        do {
-            $text = preg_replace($pattern, '', (string)$text);
-        } while (preg_match($pattern, $text));
-
-        return $this->applyModifiers($text, $modifiers);
+        return $this->applyModifiers($this->sanitizeValue($text), $modifiers);
     }

     /**
@@ -655,7 +680,10 @@ class Filter extends \Magento\Framework\Filter\Template
             $construction[2] . ($construction['filters'] ?? ''),
             'escape'
         );
-        return $this->applyModifiers($this->getVariable($directive, ''), $modifiers);
+
+        $result = $this->sanitizeValue($this->getVariable($directive, ''));
+
+        return $this->applyModifiers($result, $modifiers);
     }

     /**
@@ -736,21 +764,14 @@ class Filter extends \Magento\Framework\Filter\Template
     }

     /**
-     * HTTP Protocol directive
-     *
-     * Usage:
-     *
-     *     {{protocol}} - current protocol http or https
-     *     {{protocol url="www.domain.com/"}} - domain URL with current protocol
-     *     {{protocol http="http://url" https="https://url"}}
-     *     {{protocol store="1"}} - Optional parameter which gets protocol from provide store based on store ID or code
-     *
      * @param string[] $construction
+     *
      * @return string
+     *
      * @throws MailException
      * @throws NoSuchEntityException
      */
-    public function protocolDirective($construction)
+    private function resolveProtocolDirective($construction)
     {
         $params = $this->getParameters($construction[2]);

@@ -781,6 +802,28 @@ class Filter extends \Magento\Framework\Filter\Template
         return $protocol;
     }

+    /**
+     * HTTP Protocol directive
+     *
+     * Usage:
+     *
+     *     {{protocol}} - current protocol http or https
+     *     {{protocol url="www.domain.com/"}} - domain URL with current protocol
+     *     {{protocol http="http://url" https="https://url"}}
+     *     {{protocol store="1"}} - Optional parameter which gets protocol from provide store based on store ID or code
+     *
+     * @param string[] $construction
+     * @return string
+     * @throws MailException
+     * @throws NoSuchEntityException
+     */
+    public function protocolDirective($construction)
+    {
+        return $this->sanitizeValue(
+            $this->resolveProtocolDirective($construction)
+        );
+    }
+
     /**
      * Validate protocol directive HTTP parameters.
      *
@@ -830,7 +873,7 @@ class Filter extends \Magento\Framework\Filter\Template
                 $storeId
             );
         }
-        return $configValue;
+        return $this->sanitizeValue($configValue);
     }

     /**
@@ -871,7 +914,8 @@ class Filter extends \Magento\Framework\Filter\Template
                 $customVarValue = $value;
             }
         }
-        return $customVarValue;
+
+        return $this->sanitizeValue($customVarValue);
     }

     /**
@@ -1098,4 +1142,14 @@ class Filter extends \Magento\Framework\Filter\Template
         }
         return $value;
     }
+
+    /**
+     * @param string $value
+     *
+     * @return string|bool
+     */
+    private function sanitizeValue($value)
+    {
+        return is_bool($value) ? $value : str_replace(['{', '}'], '', (string) $value);
+    }
 }