diff options
| -rw-r--r-- | changelog.d/5802.misc | 1 | ||||
| -rw-r--r-- | synapse/handlers/message.py | 4 |
2 files changed, 4 insertions, 1 deletions
diff --git a/changelog.d/5802.misc b/changelog.d/5802.misc new file mode 100644 index 0000000000..de31192652 --- /dev/null +++ b/changelog.d/5802.misc @@ -0,0 +1 @@ +Deny redactions of events sent in a different room. diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py index e951c39fa7..a5e23c4caf 100644 --- a/synapse/handlers/message.py +++ b/synapse/handlers/message.py @@ -795,7 +795,6 @@ class EventCreationHandler(object): get_prev_content=False, allow_rejected=False, allow_none=True, - check_room_id=event.room_id, ) # we can make some additional checks now if we have the original event. @@ -803,6 +802,9 @@ class EventCreationHandler(object): if original_event.type == EventTypes.Create: raise AuthError(403, "Redacting create events is not permitted") + if original_event.room_id != event.room_id: + raise SynapseError(400, "Cannot redact event from a different room") + prev_state_ids = yield context.get_prev_state_ids(self.store) auth_events_ids = yield self.auth.compute_auth_events( event, prev_state_ids, for_verification=True |