CVE-2025-55031CRITICAL 9.8EPSS p30.3%

CVE-2025-55031CVE-2025-55031

Description

Malicious pages could use Firefox for iOS to pass FIDO: links to the OS and trigger the hybrid passkey transport. An attacker within Bluetooth range could have used this to trick the user into using their passkey to log the attacker's computer into the target account. This vulnerability was fixed in Firefox for iOS 142 and Focus for iOS 142.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.39% probability of exploitation · percentile 30.3% · 2026-06-18T12:00:27Z
Published2025-08-19
Last modified2026-04-13

Underlying weaknesses· 1

CWE-601

References

  1. https://bugzilla.mozilla.org/show_bug.cgi?id=1979499
  2. https://bugzilla.mozilla.org/show_bug.cgi?id=1979804
  3. https://www.mozilla.org/security/advisories/mfsa2025-68/
  4. https://www.mozilla.org/security/advisories/mfsa2025-69/

1

TypeTargetConfidenceTier
WeaknessURL Redirection to Untrusted Site ('Open Redirect')cwe-6010%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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