fulldecent/freescout-sidebar-webhook

Easy way to allow scripts execution?

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#14 opened on Jan 27, 2025

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Description

Hi there, in my company we have a widget (provided by a WordPress plugin) that we use both with freescout and helpscout. Its html contains some scripts that we'd like to be executed on freescout. Due to the freescout restrictions that's not possible unless the correct nonce attribute is added to the script elements. So my idea was to replace this line:

https://github.com/fulldecent/freescout-sidebar-webhook/blob/739c02ff29d261a122114d63864d77a0d124f6d9/Public/js/module.js#L15

with this code:

                const cspString = $('meta[http-equiv="Content-Security-Policy"]').attr('content');
                const nonce = cspString.match(/nonce-([^']+)/)[1];


                $('#swh-content').html(response.html.replace(/{{nonce}}/g, `nonce="${nonce}"`));

with the webhook server responding with an html like:

[...]
        <script type="module" {{nonce}}>
            <?php echo file_get_contents($js_file); ?>
        </script>
[...]

what do you think? do you have a better way to do that? And/Or, are you interested into implementing it in your module?

Thank you so much!

Contributor guide

Research direction
Extract the nonce from the Content Security Policy meta tag and replace the {{nonce}} placeholder in the HTML response from the webhook.
Tech stack
javascriptphp
Domain
backendsecurity
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitPHPJavaScript
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70