Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 142.0 |
| Mozilla | Firefox Focus | < 142.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1979499Issue TrackingPermissions Required
- https://bugzilla.mozilla.org/show_bug.cgi?id=1979804Issue TrackingPermissions Required
- https://www.mozilla.org/security/advisories/mfsa2025-68/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-69/Vendor Advisory
FAQ
What is CVE-2025-55031?
CVE-2025-55031 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 t...
How severe is CVE-2025-55031?
CVE-2025-55031 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-55031?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Mozilla Firefox Focus.