Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2023-43656

28
FAUCET Score

CVE-2023-43656 is a critical vulnerability affecting matrix-hookshot, a bot connecting Matrix to external services, specifically when transformation functions are enabled. This flaw allows attackers to escape the vm2 sandbox, potentially leading to full system compromise with a CVSS score of 9.0. While there is no known active exploitation or public exploit code, the vulnerability has garnered significant community discussion, indicating awareness among security researchers. Users are advised to upgrade to version 4.5.0 or later, or disable generic.allowJsTransformationFunctions if an upgrade is not immediately possible.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.5.0CPE matchmatch criteria
cpe:2.3:a:matrix:hookshot:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.6MEDIUM

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
1.4
Impact Score
3.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.28%
Probability of exploitation in next 30 days
EPSS Percentile
20.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0028 is in the 8th percentile among its peer group of 201 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.4 Reddit, 1.2 Bluesky, 0.9 Mastodon, and 2.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.8 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / matrix-org/matrix-hookshot/commit/dc126afa6af86d66aefcd23a825326f405bcc894
Patch
github.com / matrix-org/matrix-hookshot/security/advisories/GHSA-fr97-pv6w-4cj6
Vendor Advisory