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-rw-r--r--remote.php5
1 files changed, 5 insertions, 0 deletions
diff --git a/remote.php b/remote.php
index 86b47629d73..814286860af 100644
--- a/remote.php
+++ b/remote.php
@@ -108,6 +108,11 @@ function resolveService($service) {
try {
require_once 'lib/base.php';
+ // All resources served via the DAV endpoint should have the strictest possible
+ // policy. Exempted from this is the SabreDAV browser plugin which overwrites
+ // this policy with a softer one if debug mode is enabled.
+ header("Content-Security-Policy: default-src 'none';");
+
if (\OCP\Util::needUpgrade()) {
// since the behavior of apps or remotes are unpredictable during
// an upgrade, return a 503 directly