CVE-2025-54143criticalCWE-693

CVE-2025-54143: critical vulnerability in Mozilla Firefox for iOS

Sandboxed iframes could allow local downloads despite sandbox restrictions

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28Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 9.8epss 0.5%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Mozilla · Firefox for iOS
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