Is CVE-2023-43796 actively exploited?

CVE-2023-43796 has no public evidence of in-the-wild exploitation as of 2025-02-13.

What is the CVSS score for CVE-2023-43796?

CVE-2023-43796 has a CVSS score of 5.3 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

How do I patch CVE-2023-43796?

Patch guidance is available from matrix security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2023-43796.

CVE-2023-43796 - remediation guidance & executive summary

Q: Which products are affected by CVE-2023-43796?

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

Description

Synapse is an open-source Matrix homeserver Prior to versions 1.95.1 and 1.96.0rc1, cached device information of remote users can be queried from Synapse. This can be used to enumerate the remote users known to a homeserver. System administrators are encouraged to upgrade to Synapse 1.95.1 or 1.96.0rc1 to receive a patch. As a workaround, the `federation_domain_whitelist` can be used to limit federation traffic with a homeserver.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: low
Integrity: none
Availability: none
Weaknesses: CWE-200 · Information DisclosureNVD-CWE-noinfo

Metadata

Primary Vendor: MATRIX
Published: 10/31/2023
Last Modified: 2/13/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2023-43796

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary