CVE-2025-54143

CRITICAL

9.8

Description

Sandboxed iframes on webpages could potentially allow downloads to the device, bypassing the expected sandbox restrictions declared on the parent page. This vulnerability was fixed in Firefox for iOS 141.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published8/19/2025

Last Modified4/13/2026

Sourcenvd

Honeypot Sightings0

Affected Products

mozilla:firefox

Weaknesses (CWE)

CWE-693

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1912671(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2025-60/(security@mozilla.org)

IOC Correlations

No correlations recorded

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