diff --git a/gulliver/system/class.dbMaintenance.php b/gulliver/system/class.dbMaintenance.php
index 496fd6e1c..eb3f757de 100644
--- a/gulliver/system/class.dbMaintenance.php
+++ b/gulliver/system/class.dbMaintenance.php
@@ -399,32 +399,88 @@ class DataBaseMaintenance
      */
     function backupDataBase ($outfile)
     {
+        $password = escapeshellarg($this->passwd);
+        
+        //On Windows, escapeshellarg() instead replaces percent signs, exclamation 
+        //marks (delayed variable substitution) and double quotes with spaces and 
+        //adds double quotes around the string.
+        //See: http://php.net/manual/en/function.escapeshellarg.php
+        if (PATH_SEP !== "/") {
+            $password = $this->escapeshellargCustom($this->passwd);
+        }
         $aHost = explode(':', $this->host);
         $dbHost = $aHost[0];
         if (isset($aHost[1])) {
             $dbPort = $aHost[1];
             $command = 'mysqldump'
-                . ' --user=' . $this->user
-                . ' --password=' . escapeshellarg($this->passwd)
-                . ' --host=' . $dbHost
-                . ' --port=' . $dbPort
-                . ' --opt'
-                . ' --skip-comments'
-                . ' ' . $this->dbName
-                . ' > ' . $outfile;
+                    . ' --user=' . $this->user
+                    . ' --password=' . $password
+                    . ' --host=' . $dbHost
+                    . ' --port=' . $dbPort
+                    . ' --opt'
+                    . ' --skip-comments'
+                    . ' ' . $this->dbName
+                    . ' > ' . $outfile;
         } else {
             $command = 'mysqldump'
-                . ' --host=' . $dbHost
-                . ' --user=' . $this->user
-                . ' --opt'
-                . ' --skip-comments'
-                . ' --password=' . escapeshellarg($this->passwd)
-                . ' ' . $this->dbName
-                . ' > ' . $outfile;
+                    . ' --host=' . $dbHost
+                    . ' --user=' . $this->user
+                    . ' --opt'
+                    . ' --skip-comments'
+                    . ' --password=' . $password
+                    . ' ' . $this->dbName
+                    . ' > ' . $outfile;
         }
         shell_exec($command);
     }
 
+    /**
+     * string escapeshellargCustom ( string $arg , character $quotes)
+     * 
+     * escapeshellarg() adds single quotes around a string and quotes/escapes any 
+     * existing single quotes allowing you to pass a string directly to a shell 
+     * function and having it be treated as a single safe argument. This function 
+     * should be used to escape individual arguments to shell functions coming 
+     * from user input. The shell functions include exec(), system() and the 
+     * backtick operator.
+     * 
+     * On Windows, escapeshellarg() instead replaces percent signs, exclamation 
+     * marks (delayed variable substitution) and double quotes with spaces and 
+     * adds double quotes around the string.
+     */
+    private function escapeshellargCustom($string, $quotes = "")
+    {
+        if ($quotes === "") {
+            $quotes = PHP_OS == "WINNT" ? "\"" : "'";
+        }
+        $n = strlen($string);
+        $especial = ["!", "%", "\""];
+        $substring = "";
+        $result1 = [];
+        $result2 = [];
+        for ($i = 0; $i < $n; $i++) {
+            if (in_array($string[$i], $especial, true)) {
+                $result2[] = $string[$i];
+                $result1[] = $substring;
+                $substring = "";
+            } else {
+                $substring = $substring . $string[$i];
+            }
+        }
+        $result1[] = $substring;
+        //Rebuild the password string
+        $n = count($result1);
+        for ($i = 0; $i < $n; $i++) {
+            $result1[$i] = trim(escapeshellarg($result1[$i]), $quotes);
+            if (isset($result2[$i])) {
+                $result1[$i] = $result1[$i] . $result2[$i];
+            }
+        }
+        //add simple quotes, see escapeshellarg function
+        $newString = $quotes . implode("", $result1) . $quotes;
+        return $newString;
+    }
+
     /**
      * restoreFromSql
      *
diff --git a/workflow/engine/classes/class.patch.php b/workflow/engine/classes/class.patch.php
index efcd15065..f19d967e0 100644
--- a/workflow/engine/classes/class.patch.php
+++ b/workflow/engine/classes/class.patch.php
@@ -26,27 +26,19 @@ class p11835 extends patch
      */
     static public function isApplicable()
     {
-        if (!class_exists('System')) {
+        if (! class_exists('System')) {
             G::LoadClass("System");
         }
 
         patch::$isPathchable = false;
         $con = Propel::getConnection("workflow");
-        $stmt = $con->prepareStatement("SHOW TABLES LIKE 'TASK'");
+        $stmt = $con->prepareStatement("describe TASK;");
         $rs = $stmt->executeQuery();
         $rs->next();
-        $row = $rs->getRow();
-        if (empty($row) === true) {
-            return patch::$isPathchable;
-        }
-
-        $stmt = $con->prepareStatement("DESCRIBE TASK");
-        $rs = $stmt->executeQuery();
-        $rs->next();
-        while ($row = $rs->getRow()) {
+        while($row = $rs->getRow()) {
             if ($row ['Field'] == "TAS_GROUP_VARIABLE") {
-                $version = System::getVersion();
-                $version = explode('-', $version);
+                $version = System::getVersion ();
+                $version = explode('-',$version);
                 if ($version[0] == '2.5.1') {
                     echo "Version " . $version[0] . " Patch\n";
                     patch::$isPathchable = true;