diff --git a/lib/Entity/DataSet.php b/lib/Entity/DataSet.php
index 482a57be35..e263eadb6a 100644
--- a/lib/Entity/DataSet.php
+++ b/lib/Entity/DataSet.php
@@ -1,8 +1,8 @@
 <?php
 /*
- * Copyright (C) 2023 Xibo Signage Ltd
+ * Copyright (C) 2024 Xibo Signage Ltd
  *
- * Xibo - Digital Signage - http://www.xibo.org.uk
+ * Xibo - Digital Signage - https://xibosignage.com
  *
  * This file is part of Xibo.
  *
@@ -526,7 +526,21 @@ public function getData($filterBy = [], $options = [], $extraParams = [])
                     continue;
                 }
 
-                $formula = str_ireplace($this->blackList, '', htmlspecialchars_decode($column->formula, ENT_QUOTES));
+                $count = 0;
+                $formula = str_ireplace(
+                    $this->blackList,
+                    '',
+                    htmlspecialchars_decode($column->formula, ENT_QUOTES),
+                    $count
+                );
+
+                if ($count > 0) {
+                    $this->getLog()->error(
+                        'Formula contains disallowed keywords on DataSet ID ' . $this->dataSetId
+                    );
+                    continue;
+                }
+
                 $formula = str_replace('[DisplayId]', $displayId, $formula);
 
                 $heading = str_replace('[DisplayGeoLocation]', $displayGeoLocation, $formula) . ' AS `' . $column->heading . '`';
diff --git a/lib/Entity/DataSetColumn.php b/lib/Entity/DataSetColumn.php
index d05c933b90..c95e9b7b0f 100644
--- a/lib/Entity/DataSetColumn.php
+++ b/lib/Entity/DataSetColumn.php
@@ -1,6 +1,6 @@
 <?php
 /*
- * Copyright (C) 2023 Xibo Signage Ltd
+ * Copyright (C) 2024 Xibo Signage Ltd
  *
  * Xibo - Digital Signage - https://xibosignage.com
  *
@@ -146,6 +146,9 @@ class DataSetColumn implements \JsonSerializable
     /** @var  DataSetColumnTypeFactory */
     private $dataSetColumnTypeFactory;
 
+    /** @var array Blacklist for SQL */
+    private $blackList = [';', 'INSERT', 'UPDATE', 'SELECT', 'DELETE', 'TRUNCATE', 'TABLE', 'FROM', 'WHERE'];
+
     /**
      * The prior dataset column id, when cloning
      * @var int
@@ -278,7 +281,19 @@ public function validate()
         // if formula dataSetType is set and formula is not empty, try to execute the SQL to validate it - we're ignoring client side formulas here.
         if ($this->dataSetColumnTypeId == 2 && $this->formula != '' && substr($this->formula, 0, 1) !== '$') {
             try {
-                $formula = str_replace('[DisplayId]', 0, $this->formula);
+                $count = 0;
+                $formula = str_ireplace(
+                    $this->blackList,
+                    '',
+                    htmlspecialchars_decode($this->formula, ENT_QUOTES),
+                    $count
+                );
+
+                if ($count > 0) {
+                    throw new InvalidArgumentException(__('Formula contains disallowed keywords.'));
+                }
+
+                $formula = str_replace('[DisplayId]', 0, $formula);
                 // replace DisplayGeoLocation with default CMS location, just to validate here.
                 $formula = str_replace('[DisplayGeoLocation]', "GEOMFROMTEXT('POINT(51.504 -0.104)')", $formula);
                 $this->getStore()->select('SELECT * FROM (SELECT `id`, ' . $formula . ' AS `' . $this->heading . '`  FROM `dataset_' . $this->dataSetId . '`) dataset WHERE 1 = 1 ', [], 'isolated');