CVE-2025-11720HIGH 8.1EPSS p15.3%

CVE-2025-11720CVE-2025-11720

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 was fixed in Firefox 144.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
EPSS0.24% probability of exploitation · percentile 15.3% · 2026-06-18T12:00:27Z
Published2025-10-14
Last modified2026-04-13

Underlying weaknesses· 1

CWE-451

References

  1. https://bugzilla.mozilla.org/show_bug.cgi?id=1979534
  2. https://bugzilla.mozilla.org/show_bug.cgi?id=1984370
  3. https://www.mozilla.org/security/advisories/mfsa2025-81/

1

TypeTargetConfidenceTier
WeaknessUser Interface (UI) Misrepresentation of Critical Informationcwe-4510%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.