High‑Severity Type Confusion in Google Chromium V8 (CVE‑2021‑30563) Risks Browser‑Based Execution
What It Is
CVE‑2021‑30563 is a type‑confusion flaw in the V8 JavaScript engine used by Google Chromium. The defect can be triggered by a maliciously crafted HTML page, leading to heap corruption and the possibility of remote code execution on the victim’s machine.
Exploitability
The vulnerability is rated High (CVSS v3.1 base score 8.8). Public proof‑of‑concept code has been released, and the issue is exploitable remotely without user interaction beyond loading a web page. No confirmed large‑scale active exploitation has been reported, but the attack surface is broad because many browsers embed V8.
Affected Products
- Google Chrome (all versions prior to the March 2022 patch)
- Microsoft Edge (Chromium‑based releases prior to the March 2022 patch)
- Opera (versions prior to the March 2022 patch)
- Any third‑party application that bundles the vulnerable V8 engine.
Why It Matters for Compliance & Audit Readiness
- Vendor‑Management Controls – Demonstrating timely patch management is a core evidence point for frameworks such as NIST CSF PR.IP‑12 and ISO 27001 A.12.6.1.
- Continuous Control Monitoring – Automated inventory of browser versions and rapid remediation provide a defensible audit trail that shows due diligence in reducing remote‑code‑execution risk.
- Trust & Assurance – Unpatched V8 undermines the integrity of client‑side execution environments, eroding the trust relationship between users and web‑based services. Remediation aligns with the “protect” function of the NIST CSF and supports privacy‑by‑design obligations where browser‑based data collection is involved.
Recommended Actions
- Map the Control – Align the V8 patch to your organization’s “Patch Management” control (e.g., NIST PR.IP‑12). Document the mapping in your GRC tool.
- Capture Evidence – Run a vulnerability scanner or script to confirm that all endpoints run a V8 version ≥ 9.2.307.13 (or later). Export the results for audit evidence.
- Validate Posture – Deploy a configuration management baseline that blocks execution of unpatched browsers and enforces auto‑update policies.
- Communicate – Notify internal application owners that any custom browsers or embedded V8 components must be updated.
- Monitor – Enable continuous monitoring alerts for any re‑introduction of vulnerable V8 binaries.
Source: https://nvd.nist.gov/vuln/detail/CVE-2021-30563