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-rw-r--r--user_guide_src/source/libraries/input.rst4
1 files changed, 4 insertions, 0 deletions
diff --git a/user_guide_src/source/libraries/input.rst b/user_guide_src/source/libraries/input.rst
index 274e49af4..d9c6c2dd1 100644
--- a/user_guide_src/source/libraries/input.rst
+++ b/user_guide_src/source/libraries/input.rst
@@ -53,6 +53,10 @@ this::
Please refer to the :doc:`Security class <security>` documentation for
information on using XSS Filtering in your application.
+.. important:: The 'global_xss_filtering' setting is DEPRECATED and kept
+ solely for backwards-compatibility purposes. XSS escaping should
+ be performed on *output*, not *input*!
+
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Accessing form data
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