CVE-2025-54143
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Mozilla Firefox
PublishedAug 19, 2025
First seenAug 19, 2025
Weakness typeCWE-693CWE-693
How to fix
Update
- mozilla firefox141.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 141.0 | 141.0 |
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