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 affects Firefox for iOS < 142 and Focus for iOS < 142.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.02%
Vendor Advisory mozilla.org Vendor Advisory mozilla.org
Affected: Mozilla Firefox for iOS
Affected: Mozilla Focus for iOS
Published at:
Updated at:

References

Link Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1979499 issue tracking permissions required
https://bugzilla.mozilla.org/show_bug.cgi?id=1979804 issue tracking permissions required
https://www.mozilla.org/security/advisories/mfsa2025-68/ vendor advisory
https://www.mozilla.org/security/advisories/mfsa2025-69/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2025-55031?
CVE-2025-55031 has been scored as a critical severity vulnerability.
How to fix CVE-2025-55031?
To fix CVE-2025-55031, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-55031 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-55031 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-55031?
CVE-2025-55031 affects Mozilla Firefox for iOS, Mozilla Focus for iOS.
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