CVE•Published 2025-08-19•Modified 2026-09-30•1 article on news•5 live references•NVD data
CVE-2025-55031Mozilla · Firefox
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
33
Exploit Prediction Scoring System · top 67% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2025-08-19
Modified 2026-09-30
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2025-55031Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Mozilla Firefox"All exposed Mozilla Firefox instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Firefox"HTTP body or banner mentions "Firefox" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2025-55031Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2025-55031Censys host search filtered to this CVE id.
grep.app
CVE-2025-55031Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2025-55031GitHub code search for direct mentions.
Google dork
"CVE-2025-55031" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.