CVE-2025-55031
Last modified
CVE-2025-55031 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 0.39% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 142.0 |
| Mozilla | Firefox Focus | < 142.0 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1979499Issue Tracking, Permissions Required
- https://bugzilla.mozilla.org/show_bug.cgi?id=1979804Issue Tracking, Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2025-68/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-69/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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