Unable to download js attachment

bug
#1

I am getting exactly the same error as this question i.e I can upload js files after allowing it in the settings but when I try to download it, the url in the browser changes to the js file url and " The change you wanted was rejected." is displayed.

Environment:-
Discourse docker running behind Nginx (nginx is using SSL)

Discourse container logs:-

    Started GET "p5ePkm5OoKveknnMjyArlS4PPwS.js" for 192.168.32.1 at 2021-02-22 05:48:52 +0000
    Processing by UploadsController#show_short as JS
      Parameters: {"base62"=>"p5ePkm5OoKveknnMjyArlS4PPwS", "extension"=>"js"}
    Sent file afcdf626f9db8d54a1fb5e8ebcab0ea214d9226a.js (2.2ms)
    Security warning: an embedded <script> tag on another site requested protected JavaScript. If you know what you're doing, go ahead and disable forgery protection on this action to permit cross-origin JavaScript embedding.
    Completed 422 Unprocessable Entity in 59ms (ActiveRecord: 0.0ms | Allocations: 17414)
    ActionController::InvalidCrossOriginRequest (Security warning: an embedded <script> tag on another site requested protected JavaScript. If you know what you're doing, go ahead and disable forgery protection on this action to permit cross-origin JavaScript embedding.)
    /opt/bitnami/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.1/lib/action_controller/metal/request_forgery_protection.rb:266:in `verify_same_origin_request'

Nginx logs:-

    10.164.0.103 - - [22/Feb/2021:05:51:11 +0000] "GET /uploads/short-url/p5ePkm5OoKveknnMjyArlS4PPwS.js HTTP/2.0" 422 781 "getting-started-with-sftp-module/292" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36"
``

Any help or pointers is appreciated!
#2

Are you allowing *.js files to be attached to posts by users? Do you have legitimate need for javascript file attachments by your users? Just want to absolutely confirm before we proceed any further.

1 Like
#3

Thank you for quick response!
Yes, it is a coding Q/A discussion, so attaching *.js code files is a legitimate use case.

1 Like