CVE-2025-55031
CRITICALFirefox for iOS < 142 - Open Redirect via FIDO Passkey Transport
Title source: llmDescription
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.
References (4)
Core 4
Core References
Issue Tracking, Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1979499
Issue Tracking, Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1979804
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-68/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-69/
Scores
CVSS v3
9.8
EPSS
0.0039
EPSS Percentile
30.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
total
Details
CWE
CWE-601
Status
published
Products (4)
mozilla/firefox
< 142.0
Mozilla/Firefox for iOS
142
mozilla/firefox_focus
< 142.0
Mozilla/Focus for iOS
142
Published
Aug 19, 2025
Tracked Since
Feb 18, 2026