CVE-2025-11720 | THREATINT

Description

The Firefox and Firefox Focus UI for the Android custom tab feature only showed the "site" that was loaded, not the full hostname. User supplied content hosted on a subdomain of a site could have been used to fool a user into thinking it was content from a different subdomain of that site. This vulnerability affects Firefox < 144.

PUBLISHED Reserved 2025-10-13 | Published 2025-10-14 | Updated 2025-10-30 | Assigner mozilla

Product status

Any version before 144

affected

Credits

Michel Le Bihan

References

bugzilla.mozilla.org/show_bug.cgi?id=1979534

bugzilla.mozilla.org/show_bug.cgi?id=1984370

www.mozilla.org/security/advisories/mfsa2025-81/

cve.org (CVE-2025-11720)

nvd.nist.gov (CVE-2025-11720)

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