CVEvulnerability

CVE-2022-39374

6.5 MEDIUM Published 2023-05-26 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2023-05-26
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 3.0 ([email protected])
6.5 MEDIUM — CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-400

Description

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. If Synapse and a malicious homeserver are both joined to the same room, the malicious homeserver can trick Synapse into accepting previously rejected events into its view of the current state of that room. This can be exploited in a way that causes all further messages and state changes sent in that room from the vulnerable homeserver to be rejected. This issue has been patched in version 1.68.0

Affected configurations

• matrix synapse (>= 1.62.0 < 1.68.0)

Related

Weakness · CWE (1)

  • CWE-400 Uncontrolled Resource Consumption weakness

References