Add Cross-Origin-Resource-Policy header to thumbnail and download media endpoints (#12944)

2 files changed, 12 insertions, 2 deletions

diff --git a/synapse/rest/media/v1/download_resource.py b/synapse/rest/media/v1/download_resource.py
index 6180fa575e..048a042692 100644
--- a/synapse/rest/media/v1/download_resource.py
+++ b/synapse/rest/media/v1/download_resource.py
@@ -15,7 +15,11 @@
 import logging
 from typing import TYPE_CHECKING
 
-from synapse.http.server import DirectServeJsonResource, set_cors_headers
+from synapse.http.server import (
+    DirectServeJsonResource,
+    set_corp_headers,
+    set_cors_headers,
+)
 from synapse.http.servlet import parse_boolean
 from synapse.http.site import SynapseRequest
 
@@ -38,6 +42,7 @@ class DownloadResource(DirectServeJsonResource):
 
     async def _async_render_GET(self, request: SynapseRequest) -> None:
         set_cors_headers(request)
+        set_corp_headers(request)
         request.setHeader(
             b"Content-Security-Policy",
             b"sandbox;"
diff --git a/synapse/rest/media/v1/thumbnail_resource.py b/synapse/rest/media/v1/thumbnail_resource.py
index 53b1565243..2295adfaa7 100644
--- a/synapse/rest/media/v1/thumbnail_resource.py
+++ b/synapse/rest/media/v1/thumbnail_resource.py
@@ -18,7 +18,11 @@ import logging
 from typing import TYPE_CHECKING, Any, Dict, List, Optional, Tuple
 
 from synapse.api.errors import SynapseError
-from synapse.http.server import DirectServeJsonResource, set_cors_headers
+from synapse.http.server import (
+    DirectServeJsonResource,
+    set_corp_headers,
+    set_cors_headers,
+)
 from synapse.http.servlet import parse_integer, parse_string
 from synapse.http.site import SynapseRequest
 from synapse.rest.media.v1.media_storage import MediaStorage
@@ -58,6 +62,7 @@ class ThumbnailResource(DirectServeJsonResource):
 
     async def _async_render_GET(self, request: SynapseRequest) -> None:
         set_cors_headers(request)
+        set_corp_headers(request)
         server_name, media_id, _ = parse_media_id(request)
         width = parse_integer(request, "width", required=True)
         height = parse_integer(request, "height", required=True)