CVE-2025-55031

CRITICAL 9.8CVE-2025-55031 · Published 19/08/2025 · updated 30/09/2026

Package	Affected versions	Patched versions
firefox mozilla	`< 142.0`	`142.0`
firefox focus mozilla	`< 142.0`	`142.0`

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.

References

bugzilla.mozilla.org/show_bug.cgi · Issue Tracking
bugzilla.mozilla.org/show_bug.cgi · Issue Tracking
mozilla.org/security/advisories/mfsa2025-68 · Vendor Advisory
mozilla.org/security/advisories/mfsa2025-69 · Vendor Advisory

Running one of these products? Scan your site to see whether it exposes a vulnerable version.

Scan my site free