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matrix-synapse vulnerable to improper validation of receipts allows forged read receipts
Low severity
GitHub Reviewed
Published
Sep 26, 2023
in
matrix-org/synapse
•
Updated Jan 8, 2024
Users were able to forge read receipts for any event (if they knew the room ID and event ID). Note that the users were not able to view the events, but simply mark it as read. This could be confusing as clients will show the event as read by the user, even if they are not in the room.
Impact
Users were able to forge read receipts for any event (if they knew the room ID and event ID). Note that the users were not able to view the events, but simply mark it as read. This could be confusing as clients will show the event as read by the user, even if they are not in the room.
Patches
matrix-org/synapse#16327
Workarounds
There is no workaround.
References