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Allow file downloads and modals in HTML sandbox

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Jan Böhmer 2026-02-24 22:57:48 +01:00
parent 628f794b37
commit dcafc8a1a1
2 changed files with 2 additions and 2 deletions
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2
src/Controller/AttachmentFileController.php
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@ -69,7 +69,7 @@ class AttachmentFileController extends AbstractController
//Set an CSP that allows to run inline scripts, styles and images from external ressources, but does not allow any connections or others. //Set an CSP that allows to run inline scripts, styles and images from external ressources, but does not allow any connections or others.
//Also set the sandbox CSP directive with only "allow-script" to run basic scripts //Also set the sandbox CSP directive with only "allow-script" to run basic scripts
$response->headers->set('Content-Security-Policy', "default-src 'none'; script-src 'unsafe-inline'; style-src 'unsafe-inline'; img-src data:; sandbox allow-scripts;"); $response->headers->set('Content-Security-Policy', "default-src 'none'; script-src 'unsafe-inline'; style-src 'unsafe-inline'; img-src data:; sandbox allow-scripts allow-downloads allow-modals;");
//Forbid to embed the attachment render page in an iframe to prevent clickjacking, as it is not used anywhere else for now //Forbid to embed the attachment render page in an iframe to prevent clickjacking, as it is not used anywhere else for now
$response->headers->set('X-Frame-Options', 'DENY'); $response->headers->set('X-Frame-Options', 'DENY');

2
templates/attachments/html_sandbox.html.twig
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@ -65,7 +65,7 @@
<iframe referrerpolicy="no-referrer" class="content-frame" <iframe referrerpolicy="no-referrer" class="content-frame"
{# When changing this sandbox, also change the sandbox CSP in the controller #} {# When changing this sandbox, also change the sandbox CSP in the controller #}
sandbox="allow-scripts" sandbox="allow-scripts allow-downloads allow-modals"
srcdoc="{{ content|e('html_attr') }}" srcdoc="{{ content|e('html_attr') }}"
></iframe> ></iframe>