diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index 7072bca1fc..6f39e9446f 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -465,17 +465,35 @@ class RoomCreationHandler:
# the room has been created
# Calculate the minimum power level needed to clone the room
event_power_levels = power_levels.get("events", {})
+ if not isinstance(event_power_levels, dict):
+ event_power_levels = {}
state_default = power_levels.get("state_default", 50)
+ try:
+ state_default_int = int(state_default) # type: ignore[arg-type]
+ except (TypeError, ValueError):
+ state_default_int = 50
ban = power_levels.get("ban", 50)
- needed_power_level = max(state_default, ban, max(event_power_levels.values()))
+ try:
+ ban = int(ban) # type: ignore[arg-type]
+ except (TypeError, ValueError):
+ ban = 50
+ needed_power_level = max(
+ state_default_int, ban, max(event_power_levels.values())
+ )
# Get the user's current power level, this matches the logic in get_user_power_level,
# but without the entire state map.
user_power_levels = power_levels.setdefault("users", {})
+ if not isinstance(user_power_levels, dict):
+ user_power_levels = {}
users_default = power_levels.get("users_default", 0)
current_power_level = user_power_levels.get(user_id, users_default)
+ try:
+ current_power_level_int = int(current_power_level) # type: ignore[arg-type]
+ except (TypeError, ValueError):
+ current_power_level_int = 0
# Raise the requester's power level in the new room if necessary
- if current_power_level < needed_power_level:
+ if current_power_level_int < needed_power_level:
user_power_levels[user_id] = needed_power_level
await self._send_events_for_new_room(
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