This package contains a django template parser that can be used to find templates that contain variables that will not be escaped. This package currently has no knowledge of custom filters, custom tags, and python code (e.g. uses of mark safe). The code has only been tested against django versions >= 1.5 and <= 1.7.
* django >= 1.5 and < 1.8
* lxml
This package can be used on the command line by running
python -m django_xss_detection.cli
The code works by monkey patching django template code and providing through
a callback function to VariableNode that ends up referring to the
CompileStringWrapper.handle_callback method. The callback function is used
later when the code renders a given template and encounters a variable node
that will not be escaped. The implementation of detecting unquoted variable nodes
in element attributes and variable nodes in a javascript context lacking
javascript escaping are not implemented through callbacks, see
get_non_quoted_attr_vars_for_template and
get_non_js_escaped_results_for_template in parse_template.py respectively.
Additionally, the code has modified versions of built in conditional tags,
such as {% if %} and {% ifequal %}, so as to render all possible template
code. If this package does not work on your custom template tags then
you can add support for them similar to how waffle template tags are
implemented (see templatetags/waffle.py and the patch method in util.py).