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GHSA-6qf2-7x63-mm6v
No affected components available
Impact
In federated rooms, malicious homeservers can craft room events in such a way that prevents Synapse from providing full history to paginating clients.
Clients could therefore fail to display room history.
Patches
Update to Synapse 1.152.1 or later.
Workarounds
There are no known workarounds for this issue.
Identifiers
- ELEMENTSEC-2025-1636
For more information
If you have any questions or comments about this advisory, please email us at security at element.io.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.
Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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