pleroma

commit: 23be24b92fa4f868b814b2c6927f2a6a69fa882d
parent 9f79df75082cfc563ce7816a1839800aa22ec350
Author: Mark Felder <feld@feld.me>
Date:   Thu, 12 Jun 2025 21:37:50 -0700

Fix federation issue where Public visibility information in cc field was lost when sent to remote servers, causing posts to appear with inconsistent visibility across instances

Diffstat:
A
changelog.d/preserve-public-cc.fix
1
+
M
lib/pleroma/web/activity_pub/publisher.ex
15
++++++++++++++-

2 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/changelog.d/preserve-public-cc.fix b/changelog.d/preserve-public-cc.fix
@@ -0,0 +1 @@
+Fix federation issue where Public visibility information in cc field was lost when sent to remote servers, causing posts to appear with inconsistent visibility across instances
diff --git a/lib/pleroma/web/activity_pub/publisher.ex b/lib/pleroma/web/activity_pub/publisher.ex
@@ -93,7 +93,20 @@ defmodule Pleroma.Web.ActivityPub.Publisher do
 
     {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
 
-    cc = Map.get(params, :cc, [])
+    param_cc = Map.get(params, :cc, [])
+
+    original_cc = Map.get(data, "cc", [])
+
+    public_address = Pleroma.Constants.as_public()
+
+    # Avoid overriding explicitly set cc values for specific recipients.
+    # e.g., this ensures unlisted posts are visible to users on other servers.
+    cc =
+      if public_address in original_cc and param_cc == [] do
+        [public_address]
+      else
+        param_cc
+      end
 
     json =
       data