CVE-2022-29911

Mozilla: iframe Sandbox bypass

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Severity

Important

Red Hat Product Security

7.5

CVSS 3.0

Review impact separately from score.

Published · May 3, 2022

Updated · November 21, 2025

Description

A flaw was found in Mozilla. The Mozilla Foundation Security Advisory describes the issue of Firefox not protecting against top-level navigations for an iframe sandbox with a policy relaxed through a keyword likely to allow top-navigation-by-user-activation.

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 3.0 · 7.5
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE-1021 · Improper Restriction of Rendered UI Layers or Frames