What’s Vulnerable › Vulnerabilities

CVE-2025-55031: Passkey phishing within Bluetooth range

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-08-19 · updated 2026-09-30
• Weakness: CWE-601

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.

Affected products

• Mozilla Firefox: before 142.0 — fixed in 142.0
• Mozilla Focus for iOS: before 142.0 — fixed in 142.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 142.0; Mozilla Focus for iOS 142.0. Check the vendor advisory for mitigations.

References

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

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