CVE-2025-6433 describes a critical vulnerability in Firefox and Thunderbird versions prior to 140, where a webpage with an invalid TLS certificate could still prompt a user for WebAuthn authentication if an exception was granted, violating security specifications. This vulnerability carries a CVSS score of 9.8 (CRITICAL) due to its network-based attack vector, low attack complexity, and high potential for confidentiality, integrity, and availability impacts. While no active exploits, public exploit code, or significant community discussion have been observed, the high FAUCET Risk Score of 87/100 indicates a serious potential threat.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 140.0CPE matchmatch criteria | cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.