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| -rw-r--r-- | README.rst | 15 |
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diff --git a/README.rst b/README.rst index 172dd4dfa0..323f5b8db7 100644 --- a/README.rst +++ b/README.rst @@ -199,6 +199,21 @@ run (e.g. ``~/.synapse``), and:: source ./bin/activate synctl start +Security Note +============= + +Matrix serves raw user generated data in some APIs - specifically the content +repository endpoints: http://matrix.org/docs/spec/client_server/r0.2.0.html#get-matrix-media-r0-download-servername-mediaid +Whilst we have tried to mitigate against possible XSS attacks (e.g. +https://github.com/matrix-org/synapse/pull/1021) we recommend running +matrix homeservers on a dedicated domain name, to limit any malicious user generated +content served to web browsers a matrix API from being able to attack webapps hosted +on the same domain. This is particularly true of sharing a matrix webclient and +server on the same domain. + +See https://github.com/vector-im/vector-web/issues/1977 and +https://developer.github.com/changes/2014-04-25-user-content-security for more details. + Using PostgreSQL ================ |