Name: CVE-2022-39374: Uncontrolled Resource Consumption
Creator: Rapid7
Published: 2023-05-26T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2022-39374, CWE-400, CVSS 6.5, EPSS 0.00941

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

CVSS Details

CVSS 3.1 Base Score: 6.5
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alpine Linux	—	Upgrade synapse	Aug 22, 2024	May 26, 2023
Ubuntu	—	Upgrade matrix-synapse (Ubuntu Pro)	Apr 24, 2025	May 26, 2023

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CVSS Details

Covered by Rapid7

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