Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. The Matrix specification specifies a list of [event authorization rules](https://spec.matrix.org/v1.2/rooms/v9/#authorization-rules) which must be checked when determining if an event should be accepted into a room. In versions of Synapse up to and including version 1.61.0, some of these rules are not correctly applied. An attacker could craft events which would be accepted by Synapse but not a spec-conformant server, potentially causing divergence in the room state between servers. Administrators of homeservers with federation enabled are advised to upgrade to version 1.62.0 or higher. Federation can be disabled by setting [`federation_domain_whitelist`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#federation_domain_whitelist) to an empty list (`[]`) as a workaround.
History

Wed, 23 Apr 2025 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2022-09-02T20:00:16.000Z

Updated: 2025-04-23T17:32:15.848Z

Reserved: 2022-05-18T00:00:00.000Z

Link: CVE-2022-31152

cve-icon Vulnrichment

Updated: 2024-08-03T07:11:39.363Z

cve-icon NVD

Status : Modified

Published: 2022-09-02T20:15:08.370

Modified: 2024-11-21T07:04:00.550

Link: CVE-2022-31152

cve-icon Redhat

No data.