Mitigate XSS Attacks with Content Security Policy

[pmusaraj (Penar Musaraj)]

It depends on what URLs your ads are requesting. You can look at your browser’s console to see them.

See also the relevant section from the OP:

@xrav3nz

4. Third-Party Script / Service Integration

Different integrations will have different requirements, but can be addressed similarly.

You could look up the integration’s recommended CSP whitelist, and extend the default CSP accordingly. I suggest simply turn on CSP Report Only mode in Discourse, and watch your console to determine which resources you’ll need to whitelist to make your integrations work.

This is especially important when using third-party script bundlers like Google Tag Manager or Segment, because these bundlers might load many third-party or inline scripts. (You might even end up adding 'unsafe-inline' when using Segment or GTM, even though this definition should be avoided as much as possible.)