1 files changed, 3 insertions, 0 deletions
diff --git a/UPGRADING b/UPGRADING
index 0d849a15e5..534e8bf5b7 100755
--- a/UPGRADING
+++ b/UPGRADING
@@ -174,6 +174,9 @@ UPGRADE NOTES - PHP X.Y
   just the first matching node.
 - All SimpleXMLElement children are now always printed when using var_dump(),
   var_export(), and print_r().
+- Write operations within XSLT (for example with the extension sax:output) are
+  disabled by default. You can define what is forbidden with the method
+  XsltProcess::setSecurityPrefs($options)
 
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 5. Changes made to existing methods