diff --git a/src/Resources/contao/drivers/DC_Table.php b/src/Resources/contao/drivers/DC_Table.php
index e8ebd67676..74e54b7111 100644
--- a/src/Resources/contao/drivers/DC_Table.php
+++ b/src/Resources/contao/drivers/DC_Table.php
@@ -438,7 +438,7 @@ public function show()
 
 				foreach ((array) $value as $v)
 				{
-					$objKey = $this->Database->prepare("SELECT " . $chunks[1] . " AS value FROM " . $chunks[0] . " WHERE id=?")
+					$objKey = $this->Database->prepare("SELECT " . \Database::quoteColumnName($chunks[1]) . " AS value FROM " . $chunks[0] . " WHERE id=?")
 											 ->limit(1)
 											 ->execute($v);
 
@@ -3138,12 +3138,12 @@ protected function save($varValue)
 			{
 				if ($GLOBALS['TL_DCA'][$this->strTable]['list']['sorting']['mode'] == 4)
 				{
-					$this->Database->prepare("UPDATE " . $this->strTable . " SET " . $this->strField . "='' WHERE pid=?")
+					$this->Database->prepare("UPDATE " . $this->strTable . " SET " . \Database::quoteColumnName($this->strField) . "='' WHERE pid=?")
 								   ->execute($this->activeRecord->pid);
 				}
 				else
 				{
-					$this->Database->execute("UPDATE " . $this->strTable . " SET " . $this->strField . "=''");
+					$this->Database->execute("UPDATE " . $this->strTable . " SET " . \Database::quoteColumnName($this->strField) . "=''");
 				}
 			}
 
@@ -3156,7 +3156,7 @@ protected function save($varValue)
 			$arrValues = $this->values;
 			array_unshift($arrValues, $varValue);
 
-			$objUpdateStmt = $this->Database->prepare("UPDATE " . $this->strTable . " SET " . $this->strField . "=? WHERE " . implode(' AND ', $this->procedure))
+			$objUpdateStmt = $this->Database->prepare("UPDATE " . $this->strTable . " SET " . \Database::quoteColumnName($this->strField) . "=? WHERE " . implode(' AND ', $this->procedure))
 											->execute($arrValues);
 
 			if ($objUpdateStmt->affectedRows)
@@ -3877,7 +3877,7 @@ protected function generateTree($table, $id, $arrPrevNext, $blnHasSorting, $intM
 				list($strKey, $strTable) = explode(':', $v);
 				list($strTable, $strField) = explode('.', $strTable);
 
-				$objRef = $this->Database->prepare("SELECT " . $strField . " FROM " . $strTable . " WHERE id=?")
+				$objRef = $this->Database->prepare("SELECT " . \Database::quoteColumnName($strField) . " FROM " . $strTable . " WHERE id=?")
 										 ->limit(1)
 										 ->execute($objRow->$strKey);
 
@@ -4187,7 +4187,7 @@ protected function parentView()
 				{
 					$arrForeignKey = explode('.', $GLOBALS['TL_DCA'][$this->ptable]['fields'][$v]['foreignKey'], 2);
 
-					$objLabel = $this->Database->prepare("SELECT " . $arrForeignKey[1] . " AS value FROM " . $arrForeignKey[0] . " WHERE id=?")
+					$objLabel = $this->Database->prepare("SELECT " . \Database::quoteColumnName($arrForeignKey[1]) . " AS value FROM " . $arrForeignKey[0] . " WHERE id=?")
 											   ->limit(1)
 											   ->execute($_v);
 
@@ -4293,7 +4293,7 @@ protected function parentView()
 				if (isset($GLOBALS['TL_DCA'][$this->strTable]['fields'][$firstOrderBy]['foreignKey']))
 				{
 					$key = explode('.', $GLOBALS['TL_DCA'][$this->strTable]['fields'][$firstOrderBy]['foreignKey'], 2);
-					$query = "SELECT *, (SELECT ". $key[1] ." FROM ". $key[0] ." WHERE ". $this->strTable .".". $firstOrderBy ."=". $key[0] .".id) AS foreignKey FROM " . $this->strTable;
+					$query = "SELECT *, (SELECT ". \Database::quoteColumnName($key[1]) ." FROM ". $key[0] ." WHERE ". $this->strTable .".". \Database::quoteColumnName($firstOrderBy) ."=". $key[0] .".id) AS foreignKey FROM " . $this->strTable;
 					$orderBy[0] = 'foreignKey';
 				}
 			}
@@ -4668,7 +4668,7 @@ protected function listView()
 				$firstOrderBy = 'pid';
 				$showFields = $GLOBALS['TL_DCA'][$table]['list']['label']['fields'];
 
-				$query .= " ORDER BY (SELECT " . $showFields[0] . " FROM " . $this->ptable . " WHERE " . $this->ptable . ".id=" . $this->strTable . ".pid), " . implode(', ', $orderBy);
+				$query .= " ORDER BY (SELECT " . \Database::quoteColumnName($showFields[0]) . " FROM " . $this->ptable . " WHERE " . $this->ptable . ".id=" . $this->strTable . ".pid), " . implode(', ', $orderBy);
 
 				// Set the foreignKey so that the label is translated
 				if ($GLOBALS['TL_DCA'][$table]['fields']['pid']['foreignKey'] == '')
@@ -4805,7 +4805,7 @@ protected function listView()
 						list($strKey, $strTable) = explode(':', $v);
 						list($strTable, $strField) = explode('.', $strTable);
 
-						$objRef = $this->Database->prepare("SELECT " . $strField . " FROM " . $strTable . " WHERE id=?")
+						$objRef = $this->Database->prepare("SELECT " . \Database::quoteColumnName($strField) . " FROM " . $strTable . " WHERE id=?")
 												 ->limit(1)
 												 ->execute($row[$strKey]);
 
@@ -5079,7 +5079,7 @@ protected function searchMenu()
 			{
 				try
 				{
-					$this->Database->prepare("SELECT * FROM " . $this->strTable . " WHERE " . $strField . " REGEXP ?")
+					$this->Database->prepare("SELECT * FROM " . $this->strTable . " WHERE " . \Database::quoteColumnName($strField) . " REGEXP ?")
 								   ->limit(1)
 								   ->execute($strKeyword);
 				}
@@ -5110,12 +5110,12 @@ protected function searchMenu()
 			if (isset($GLOBALS['TL_DCA'][$this->strTable]['fields'][$fld]['foreignKey']))
 			{
 				list($t, $f) = explode('.', $GLOBALS['TL_DCA'][$this->strTable]['fields'][$fld]['foreignKey']);
-				$this->procedure[] = "(" . sprintf($strPattern, $fld) . " OR " . sprintf($strPattern, "(SELECT $f FROM $t WHERE $t.id={$this->strTable}.$fld)") . ")";
+				$this->procedure[] = "(" . sprintf($strPattern, \Database::quoteColumnName($fld)) . " OR " . sprintf($strPattern, "(SELECT ".\Database::quoteColumnName($f)." FROM $t WHERE $t.id={$this->strTable}.".\Database::quoteColumnName($fld).")") . ")";
 				$this->values[] = $session['search'][$this->strTable]['value'];
 			}
 			else
 			{
-				$this->procedure[] = sprintf($strPattern, $fld);
+				$this->procedure[] = sprintf($strPattern, \Database::quoteColumnName($fld));
 			}
 
 			$this->values[] = $session['search'][$this->strTable]['value'];
@@ -5718,7 +5718,7 @@ protected function filterMenu($intFilterPanel)
 					{
 						$key = explode('.', $GLOBALS['TL_DCA'][$this->strTable]['fields'][$field]['foreignKey'], 2);
 
-						$objParent = $this->Database->prepare("SELECT " . $key[1] . " AS value FROM " . $key[0] . " WHERE id=?")
+						$objParent = $this->Database->prepare("SELECT " . \Database::quoteColumnName($key[1]) . " AS value FROM " . $key[0] . " WHERE id=?")
 													->limit(1)
 													->execute($vv);
 
@@ -5745,7 +5745,7 @@ protected function filterMenu($intFilterPanel)
 							$showFields[0] = 'id';
 						}
 
-						$objShowFields = $this->Database->prepare("SELECT " . $showFields[0] . " FROM ". $this->ptable . " WHERE id=?")
+						$objShowFields = $this->Database->prepare("SELECT " . \Database::quoteColumnName($showFields[0]) . " FROM ". $this->ptable . " WHERE id=?")
 														->limit(1)
 														->execute($vv);
 
@@ -5871,7 +5871,7 @@ protected function formatCurrentValue($field, $value, $mode)
 		{
 			$key = explode('.', $GLOBALS['TL_DCA'][$this->strTable]['fields'][$field]['foreignKey'], 2);
 
-			$objParent = $this->Database->prepare("SELECT " . $key[1] . " AS value FROM " . $key[0] . " WHERE id=?")
+			$objParent = $this->Database->prepare("SELECT " . \Database::quoteColumnName($key[1]) . " AS value FROM " . $key[0] . " WHERE id=?")
 										->limit(1)
 										->execute($value);
 
diff --git a/src/Resources/contao/library/Contao/Database.php b/src/Resources/contao/library/Contao/Database.php
index 3fdd9e1bd3..edd86902d6 100644
--- a/src/Resources/contao/library/Contao/Database.php
+++ b/src/Resources/contao/library/Contao/Database.php
@@ -235,7 +235,7 @@ public function findInSet($strKey, $varSet, $blnIsField=false)
 			$varSet = $this->resConnection->quote($varSet);
 		}
 
-		return "FIND_IN_SET(" . $strKey . ", " . $varSet . ")";
+		return "FIND_IN_SET(" . static::quoteColumnName($strKey) . ", " . $varSet . ")";
 	}
 
 
@@ -490,7 +490,7 @@ public function getFieldNames($strTable, $blnNoCache=false)
 	 */
 	public function isUniqueValue($strTable, $strField, $varValue, $intId=null)
 	{
-		$strQuery = "SELECT * FROM $strTable WHERE $strField=?";
+		$strQuery = "SELECT * FROM $strTable WHERE " . static::quoteColumnName($strField) . "=?";
 
 		if ($intId !== null)
 		{
@@ -706,6 +706,32 @@ public function getUuid()
 	}
 
 
+	/**
+	 * Quote the column name if it is a reserved word
+	 *
+	 * @param string $strName
+	 *
+	 * @return string
+	 */
+	public static function quoteColumnName($strName)
+	{
+		return \System::getContainer()->get('database_connection')->getDatabasePlatform()->quoteSingleIdentifier($strName);
+	}
+
+
+	/**
+	 * Quote a list of column names
+	 *
+	 * @param string[] $arrNames
+	 *
+	 * @return string[]
+	 */
+	public static function quoteColumnNames(array $arrNames)
+	{
+		return array_map(array(static::class, 'quoteColumnName'), $arrNames);
+	}
+
+
 	/**
 	 * Execute a query and do not cache the result
 	 *
diff --git a/src/Resources/contao/library/Contao/Database/Statement.php b/src/Resources/contao/library/Contao/Database/Statement.php
index 290cc3080a..62c4afe5bd 100644
--- a/src/Resources/contao/library/Contao/Database/Statement.php
+++ b/src/Resources/contao/library/Contao/Database/Statement.php
@@ -182,7 +182,7 @@ public function set($arrParams)
 		if (strncasecmp($this->strQuery, 'INSERT', 6) === 0)
 		{
 			$strQuery = sprintf('(%s) VALUES (%s)',
-								implode(', ', array_keys($arrParams)),
+								implode(', ', \Database::quoteColumnNames(array_keys($arrParams))),
 								str_replace('%', '%%', implode(', ', array_values($arrParams))));
 		}
 
@@ -193,7 +193,7 @@ public function set($arrParams)
 
 			foreach ($arrParams as $k=>$v)
 			{
-				$arrSet[] = $k . '=' . $v;
+				$arrSet[] = \Database::quoteColumnName($k) . '=' . $v;
 			}
 
 			$strQuery = 'SET ' . str_replace('%', '%%', implode(', ', $arrSet));
diff --git a/src/Resources/contao/library/Contao/Model.php b/src/Resources/contao/library/Contao/Model.php
index 9acb79925d..f2f3f125c9 100644
--- a/src/Resources/contao/library/Contao/Model.php
+++ b/src/Resources/contao/library/Contao/Model.php
@@ -470,7 +470,7 @@ public function save()
 			}
 
 			// Update the row
-			$objDatabase->prepare("UPDATE " . static::$strTable . " %s WHERE " . static::$strPk . "=?")
+			$objDatabase->prepare("UPDATE " . static::$strTable . " %s WHERE " . \Database::quoteColumnName(static::$strPk) . "=?")
 						->set($arrSet)
 						->execute($intPk);
 
@@ -563,7 +563,7 @@ public function delete()
 		}
 
 		// Delete the row
-		$intAffected = \Database::getInstance()->prepare("DELETE FROM " . static::$strTable . " WHERE " . static::$strPk . "=?")
+		$intAffected = \Database::getInstance()->prepare("DELETE FROM " . static::$strTable . " WHERE " . \Database::quoteColumnName(static::$strPk) . "=?")
 											   ->execute($intPk)
 											   ->affectedRows;
 
@@ -624,7 +624,7 @@ public function getRelated($strKey, array $arrOptions=array())
 		elseif ($arrRelation['type'] == 'hasMany' || $arrRelation['type'] == 'belongsToMany')
 		{
 			$arrValues = \StringUtil::deserialize($this->$strKey, true);
-			$strField = $arrRelation['table'] . '.' . $arrRelation['field'];
+			$strField = $arrRelation['table'] . '.' . \Database::quoteColumnName($arrRelation['field']);
 
 			// Handle UUIDs (see #6525)
 			if ($strField == 'tl_files.uuid')
@@ -668,7 +668,7 @@ public function refresh()
 		}
 
 		// Reload the database record
-		$res = \Database::getInstance()->prepare("SELECT * FROM " . static::$strTable . " WHERE " . static::$strPk . "=?")
+		$res = \Database::getInstance()->prepare("SELECT * FROM " . static::$strTable . " WHERE " . \Database::quoteColumnName(static::$strPk) . "=?")
 									   ->execute($intPk);
 
 		$this->setRow($res->row());
diff --git a/src/Resources/contao/library/Contao/Model/QueryBuilder.php b/src/Resources/contao/library/Contao/Model/QueryBuilder.php
index 7d02cd56aa..c3e4fffaee 100644
--- a/src/Resources/contao/library/Contao/Model/QueryBuilder.php
+++ b/src/Resources/contao/library/Contao/Model/QueryBuilder.php
@@ -53,10 +53,10 @@ public static function find(array $arrOptions)
 
 						foreach (array_keys($objRelated->getFields()) as $strField)
 						{
-							$arrFields[] = 'j' . $intCount . '.' . $strField . ' AS ' . $strKey . '__' . $strField;
+							$arrFields[] = 'j' . $intCount . '.' . \Database::quoteColumnName($strField) . ' AS ' . $strKey . '__' . $strField;
 						}
 
-						$arrJoins[] = " LEFT JOIN " . $arrConfig['table'] . " j$intCount ON " . $arrOptions['table'] . "." . $strKey . "=j$intCount." . $arrConfig['field'];
+						$arrJoins[] = " LEFT JOIN " . $arrConfig['table'] . " j$intCount ON " . $arrOptions['table'] . "." . \Database::quoteColumnName($strKey) . "=j$intCount." . $arrConfig['field'];
 					}
 				}
 			}
@@ -68,7 +68,7 @@ public static function find(array $arrOptions)
 		// Where condition
 		if ($arrOptions['column'] !== null)
 		{
-			$strQuery .= " WHERE " . (\is_array($arrOptions['column']) ? implode(" AND ", $arrOptions['column']) : $arrOptions['table'] . '.' . $arrOptions['column'] . "=?");
+			$strQuery .= " WHERE " . (\is_array($arrOptions['column']) ? implode(" AND ", $arrOptions['column']) : $arrOptions['table'] . '.' . \Database::quoteColumnName($arrOptions['column']) . "=?");
 		}
 
 		// Group by
@@ -106,7 +106,7 @@ public static function count(array $arrOptions)
 
 		if ($arrOptions['column'] !== null)
 		{
-			$strQuery .= " WHERE " . (\is_array($arrOptions['column']) ? implode(" AND ", $arrOptions['column']) : $arrOptions['table'] . '.' . $arrOptions['column'] . "=?");
+			$strQuery .= " WHERE " . (\is_array($arrOptions['column']) ? implode(" AND ", $arrOptions['column']) : $arrOptions['table'] . '.' . \Database::quoteColumnName($arrOptions['column']) . "=?");
 		}
 
 		return $strQuery;
diff --git a/src/Resources/contao/library/Contao/User.php b/src/Resources/contao/library/Contao/User.php
index 213858e3d7..0be84f955f 100644
--- a/src/Resources/contao/library/Contao/User.php
+++ b/src/Resources/contao/library/Contao/User.php
@@ -555,7 +555,7 @@ protected function checkAccountStatus()
 	 */
 	public function findBy($strColumn, $varValue)
 	{
-		$objResult = $this->Database->prepare("SELECT * FROM " . $this->strTable . " WHERE " . $strColumn . "=?")
+		$objResult = $this->Database->prepare("SELECT * FROM " . $this->strTable . " WHERE " . \Database::quoteColumnName($strColumn) . "=?")
 									->limit(1)
 									->execute($varValue);
 
diff --git a/src/Resources/contao/widgets/FileSelector.php b/src/Resources/contao/widgets/FileSelector.php
index d3cbb32bbc..19225b49f3 100644
--- a/src/Resources/contao/widgets/FileSelector.php
+++ b/src/Resources/contao/widgets/FileSelector.php
@@ -332,7 +332,7 @@ public function generateAjax($strFolder, $strField, $level, $mount=false)
 					break;
 				}
 
-				$objField = $this->Database->prepare("SELECT " . $this->strField . " FROM " . $this->strTable . " WHERE id=?")
+				$objField = $this->Database->prepare("SELECT " . \Database::quoteColumnName($this->strField) . " FROM " . $this->strTable . " WHERE id=?")
 										   ->limit(1)
 										   ->execute($this->strId);
 
diff --git a/src/Resources/contao/widgets/FileTree.php b/src/Resources/contao/widgets/FileTree.php
index b37c9e64c8..4b4322a434 100644
--- a/src/Resources/contao/widgets/FileTree.php
+++ b/src/Resources/contao/widgets/FileTree.php
@@ -70,7 +70,7 @@ public function __construct($arrAttributes=null)
 			$this->strOrderName = $this->orderField . str_replace($this->strField, '', $this->strName);
 
 			// Retrieve the order value
-			$objRow = $this->Database->prepare("SELECT {$this->orderField} FROM {$this->strTable} WHERE id=?")
+			$objRow = $this->Database->prepare("SELECT ".\Database::quoteColumnName($this->orderField)." FROM {$this->strTable} WHERE id=?")
 									 ->limit(1)
 									 ->execute($this->activeRecord->id);
 
diff --git a/src/Resources/contao/widgets/PageSelector.php b/src/Resources/contao/widgets/PageSelector.php
index 228b191794..ef6ab41395 100644
--- a/src/Resources/contao/widgets/PageSelector.php
+++ b/src/Resources/contao/widgets/PageSelector.php
@@ -292,7 +292,7 @@ public function generateAjax($id, $strField, $level)
 					break;
 				}
 
-				$objField = $this->Database->prepare("SELECT " . $this->strField . " FROM " . $this->strTable . " WHERE id=?")
+				$objField = $this->Database->prepare("SELECT " . \Database::quoteColumnName($this->strField) . " FROM " . $this->strTable . " WHERE id=?")
 										   ->limit(1)
 										   ->execute($this->strId);
 
diff --git a/src/Resources/contao/widgets/PageTree.php b/src/Resources/contao/widgets/PageTree.php
index fc006db39c..6ea6adaea1 100644
--- a/src/Resources/contao/widgets/PageTree.php
+++ b/src/Resources/contao/widgets/PageTree.php
@@ -66,7 +66,7 @@ public function __construct($arrAttributes=null)
 			$this->strOrderName = $this->orderField . str_replace($this->strField, '', $this->strName);
 
 			// Retrieve the order value
-			$objRow = $this->Database->prepare("SELECT {$this->orderField} FROM {$this->strTable} WHERE id=?")
+			$objRow = $this->Database->prepare("SELECT ".\Database::quoteColumnName($this->orderField)." FROM {$this->strTable} WHERE id=?")
 						   ->limit(1)
 						   ->execute($this->activeRecord->id);