Is CVE-2023-45129 actively exploited?

CVE-2023-45129 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2023-45129?

CVE-2023-45129 has a CVSS score of 4.9 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2023-45129?

Patch guidance is available from matrix security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2023-45129.

CVE-2023-45129 - remediation guidance & executive summary

Q: Which products are affected by CVE-2023-45129?

3 products: matrix synapse, fedoraproject fedora, fedoraproject fedora.

Description

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Prior to version 1.94.0, a malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service. Homeservers running on a closed federation (which presumably do not need to use server ACLs) are not affected. Server administrators are advised to upgrade to Synapse 1.94.0 or later. As a workaround, rooms with malicious server ACL events can be purged and blocked using the admin API.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: high
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-770 CWE-770

Metadata

Primary Vendor: MATRIX
Published: 10/10/2023
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

matrix : synapsefedoraproject : fedorafedoraproject : fedora

Remediation Guidance

Executive Summary

Cite this page

CVE-2023-45129. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2023-45129

View on NIST NVD

CVE-2023-45129 vulnerability