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CVE Database›CVE-2020-12388

CVE-2020-12388

Mozilla: Sandbox escape with improperly guarded Access Tokens

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Severity

Critical

Red Hat Product Security

10

CVSS 3.1

Review impact separately from score.

Published · May 5, 2020

Updated · November 22, 2025

Description

The Mozilla Foundation Security Advisory describes this flaw as:

The Firefox content processes did not sufficiently lockdown access control which could result in a sandbox escape.

Statement

This issue only affects Firefox on Windows operating systems. Firefox on Linux is not affected.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CWE-284 · Improper Access Control