CI_Security: Add 'form' and 'xlink:href' to evil attributes
diff --git a/system/core/Security.php b/system/core/Security.php
index 32ecbba..40717c2 100644
--- a/system/core/Security.php
+++ b/system/core/Security.php
@@ -662,7 +662,7 @@
 	protected function _remove_evil_attributes($str, $is_image)
 	{
 		// Formaction, style, and xmlns
-		$evil_attributes = array('style', 'xmlns', 'formaction');
+		$evil_attributes = array('style', 'xmlns', 'formaction', 'form', 'xlink:href');
 
 		if ($is_image === TRUE)
 		{