CVE-2025-8042

CRITICAL

Published Aug 19, 2025 Modified Apr 13, 2026 CWE-732

Description

Firefox for Android allowed a sandboxed iframe without the `allow-downloads` attribute to start downloads. This vulnerability was fixed in Firefox 141.

CVSS v3.1 Score

9.8

CRITICAL

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

Weakness Type (CWE)

CWE-732 CWE-732

Affected Products

Vendor	Product	Versions
mozilla	firefox	< 141.0
google	android	All

References

Advisories & Patches

https://www.mozilla.org/security/advisories/mfsa2025-56/

Other References

https://bugzilla.mozilla.org/show_bug.cgi?id=1791322

Frequently Asked Questions

What is CVE-2025-8042? +

Firefox for Android allowed a sandboxed iframe without the `allow-downloads` attribute to start downloads. This vulnerability was fixed in Firefox 141. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2025-8042? +

CVE-2025-8042 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-8042? +

CVE-2025-8042 affects products from google, mozilla, specifically: android, firefox. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-8042? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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