Critical severity9.8NVD Advisory· Published Aug 19, 2025· Updated Apr 13, 2026

CVE-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.

Affected products

Mozilla Corporation/Firefox Focus
cpe:2.3:a:mozilla:firefox_focus:*:*:*:*:*:iphone_os:*:*
Range: <142.0
Mozilla Corporation/Firefox
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:iphone_os:*:*
Range: <142.0

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

www.mozilla.org/security/advisories/mfsa2025-68/nvdVendor Advisory
www.mozilla.org/security/advisories/mfsa2025-69/nvdVendor Advisory
bugzilla.mozilla.org/show_bug.cginvdIssue TrackingPermissions Required
bugzilla.mozilla.org/show_bug.cginvdIssue TrackingPermissions Required

News mentions

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cvss	0.637
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000