Is CVE-2023-43656 actively exploited?

CVE-2023-43656 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2023-43656?

CVE-2023-43656 has a CVSS score of 5.6 (MEDIUM severity). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L.

How do I patch CVE-2023-43656?

Patch guidance is available from matrix security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2023-43656.

CVE-2023-43656 - remediation guidance & executive summary

Description

matrix-hookshot is a Matrix bot for connecting to external services like GitHub, GitLab, JIRA, and more. Instances that have enabled transformation functions (those that have `generic.allowJsTransformationFunctions` in their config), may be vulnerable to an attack where it is possible to break out of the `vm2` sandbox and as a result Hookshot will be vulnerable to this. This problem is only likely to affect users who have allowed untrusted users to apply their own transformation functions. If you have only enabled a limited set of trusted users, this threat is reduced (though not eliminated). Version 4.5.0 and above of hookshot include a new sandbox library which should better protect users. Users are advised to upgrade. Users unable to upgrade should disable `generic.allowJsTransformationFunctions` in the config.

CVSS Metrics

Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
Attack Vector: local
Complexity: high
Privileges: none
User Action: none
Scope: changed
Confidentiality: low
Integrity: low
Availability: low
Weaknesses: CWE-74NVD-CWE-noinfo

Metadata

Primary Vendor: MATRIX
Published: 9/27/2023
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

matrix : hookshot

Remediation Guidance

Executive Summary

Cite this page

CVE-2023-43656. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2023-43656

View on NIST NVD

CVE-2023-43656 vulnerability