Is CVE-2022-39374 actively exploited?

CVE-2022-39374 has no public evidence of in-the-wild exploitation as of 2025-02-13.

What is the CVSS score for CVE-2022-39374?

CVE-2022-39374 has a CVSS score of 6.5 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2022-39374?

Patch guidance is available from matrix security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2022-39374.

CVE-2022-39374 - remediation guidance & executive summary

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

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-400 CWE-400

Metadata

Primary Vendor: MATRIX
Published: 5/26/2023
Last Modified: 2/13/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

matrix : synapse

Remediation Guidance

Executive Summary

Cite this page

CVE-2022-39374. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2022-39374

View on NIST NVD

CVE-2022-39374 vulnerability