CVE-2025-8042

CRITICAL 9.8

Sandboxed iframe could start downloads

CVSS Score

9.8

EPSS Score

0.1%

EPSS Percentile

21th

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

Vendor	mozilla
Product	firefox
Ecosystems	Browser JavaScript
Industries	Technology
Published	Aug 19, 2025
Last Updated	Apr 13, 2026

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Affected Versions

Mozilla / Firefox

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=1791322 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-56/

Credits

Axel Chong (@Haxatron)