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On both my Twitter userscript, and the sample userscript given in this template, the CSP fallback no longer works — it seems because the effectiveDirective has changed from script-src to script-src-elem:

I admit I don't know CSP basically at all, but the MDN documentation seems to suggest that script-src-elem falls back to script-src, so maybe a simple extra if condition in content.js would fix it?

This is Twitter's CSP for me: Content-Security-Policy: connect-src 'self' blob: https://*.pscp.tv https://*.video.pscp.tv https://*.twimg.com https://api.twitter.com https://api-stream.twitter.com https://ads-api.twitter.com https://aa.twitter.com https://caps.twitter.com https://pay.twitter.com https://sentry.io https://ton.twitter.com https://twitter.com https://upload.twitter.com https://www.google-analytics.com https://accounts.google.com/gsi/status https://accounts.google.com/gsi/log https://app.link https://api2.branch.io https://bnc.lt wss://*.pscp.tv https://vmap.snappytv.com https://vmapstage.snappytv.com https://vmaprel.snappytv.com https://vmap.grabyo.com https://dhdsnappytv-vh.akamaihd.net https://pdhdsnappytv-vh.akamaihd.net https://mdhdsnappytv-vh.akamaihd.net https://mdhdsnappytv-vh.akamaihd.net https://mpdhdsnappytv-vh.akamaihd.net https://mmdhdsnappytv-vh.akamaihd.net https://mdhdsnappytv-vh.akamaihd.net https://mpdhdsnappytv-vh.akamaihd.net https://mmdhdsnappytv-vh.akamaihd.net https://dwo3ckksxlb0v.cloudfront.net https://media.riffsy.com https://*.giphy.com https://media.tenor.com https://c.tenor.com ; default-src 'self'; form-action 'self' https://twitter.com https://*.twitter.com; font-src 'self' https://*.twimg.com; frame-src 'self' https://twitter.com https://mobile.twitter.com https://pay.twitter.com https://cards-frame.twitter.com https://accounts.google.com/ https://client-api.arkoselabs.com/ https://iframe.arkoselabs.com/ https://recaptcha.net/recaptcha/ https://www.google.com/recaptcha/ https://www.gstatic.com/recaptcha/; img-src 'self' blob: data: https://*.cdn.twitter.com https://ton.twitter.com https://*.twimg.com https://analytics.twitter.com https://cm.g.doubleclick.net https://www.google-analytics.com https://maps.googleapis.com https://www.periscope.tv https://www.pscp.tv https://media.riffsy.com https://*.giphy.com https://media.tenor.com https://c.tenor.com https://*.pscp.tv https://*.periscope.tv https://prod-periscope-profile.s3-us-west-2.amazonaws.com https://platform-lookaside.fbsbx.com https://scontent.xx.fbcdn.net https://scontent-sea1-1.xx.fbcdn.net https://*.googleusercontent.com https://imgix.revue.co; manifest-src 'self'; media-src 'self' blob: https://twitter.com https://*.twimg.com https://*.vine.co https://*.pscp.tv https://*.video.pscp.tv https://dhdsnappytv-vh.akamaihd.net https://pdhdsnappytv-vh.akamaihd.net https://mdhdsnappytv-vh.akamaihd.net https://mdhdsnappytv-vh.akamaihd.net https://mpdhdsnappytv-vh.akamaihd.net https://mmdhdsnappytv-vh.akamaihd.net https://mdhdsnappytv-vh.akamaihd.net https://mpdhdsnappytv-vh.akamaihd.net https://mmdhdsnappytv-vh.akamaihd.net https://dwo3ckksxlb0v.cloudfront.net; object-src 'none'; script-src 'self' 'unsafe-inline' https://*.twimg.com https://recaptcha.net/recaptcha/ https://www.google.com/recaptcha/ https://www.gstatic.com/recaptcha/ https://client-api.arkoselabs.com/ https://www.google-analytics.com https://twitter.com https://app.link https://accounts.google.com/gsi/client https://appleid.cdn-apple.com/appleauth/static/jsapi/appleid/1/en_US/appleid.auth.js 'nonce-ZTRhNjk1MDQtZDQ4Ni00MTMyLTg2YmItMWFlODBmOTE1ZWE1'; style-src 'self' 'unsafe-inline' https://accounts.google.com/gsi/style https://*.twimg.com; worker-src 'self' blob:; report-uri https://twitter.com/i/csp_report?a=O5RXE%3D%3D%3D&ro=false

System Information:

macOS or iOS version: macOS 11.7 Userscripts version: Userscripts Safari Version 4.2.3 (59) Safari version: Version 16.0 (16614.1.25.9.10, 16614) Is this issue related to script injection? Yes, sort of Did the test script (pasted above) successfully run on your machine? Nope

@joedrew thanks for reporting this

seems to suggest that script-src-elem falls back to script-src, so maybe a simple extra if condition in content.js would fix it?

That sounds like it can work

Also if you could share a simplified example of the userscript that is failing that would be useful. I really just need the metadata, so the content of the code could be a simple console.log statement.

Yep, this one fails:

// ==UserScript==
// @name          TestScript
// @description   This is your new file, start writing code
// @match         <all_urls>
// @exclude-match *://*.google.com/*
// @noframes
// ==/UserScript==

console.log(`This is a test script - ${window.location.href}`);

(Note that I'm going to any random Twitter page, e.g. https://twitter.com/drewgrof, while logged out.)

should be resolved in https://github.com/quoid/userscripts/commit/ad38891a1d70c43f2358e134473efd5ee83c5eb6