SB2021033065 - Improper access control in isolated-vm

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Main Vulnerability Database SB2021033065

SB2021033065 - Improper access control in isolated-vm

Published: March 30, 2021 Updated: November 9, 2026

Security Bulletin ID SB2021033065
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper access control (CVE-ID: CVE-2021-21413)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows an attacker controlling code in an isolate to escape isolation and access the permissions of the main Node.js context.

The vulnerability exists due to unrestricted prototype-chain traversal through Reference objects in isolated-vm when an application exposes such an object to untrusted isolate code. An attacker controlling code in an isolate can traverse the exposed reference to obtain a reference to the main context's Function object.


Remediation

Install update from vendor's website.

References