Set object_src to 'none' #52
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object-src is a common pathway for XSS injections. I doubt most sites using Flask use archaic plug-in elements but the possibility exists. It's probably better explained in this paper: https://dl.acm.org/doi/pdf/10.1145/2976749.2978363 Even Google's CSP Evaluator now flags websites with a missing object-src value in their CSP.
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The issue probably lies in how Python 3.5 processes a dict and the code in the module parsing the dict into an OrderedDict() |
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object-src is a common pathway for XSS injections. I doubt most sites using Flask use archaic plug-in elements but the possibility exists.
It's probably better explained in this paper: https://dl.acm.org/doi/pdf/10.1145/2976749.2978363
Even Google's CSP Evaluator now flags websites with a missing object-src value in their CSP.