If a user visited a webpage with an invalid TLS certificate, and granted an exception, the webpage was able to provide a WebAuthn challenge that the user would be prompted to complete. This is in violation of the WebAuthN spec which requires "a secure transport established without errors". This vulnerability affects Firefox < 140 and Thunderbird < 140.
CVSS
No CVSS.
References
| Link | Resource |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1954033 | Permissions Required |
| https://www.mozilla.org/security/advisories/mfsa2025-51/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-54/ |
Configurations
History
14 Jul 2025, 19:15
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
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| Summary | If a user visited a webpage with an invalid TLS certificate, and granted an exception, the webpage was able to provide a WebAuthn challenge that the user would be prompted to complete. This is in violation of the WebAuthN spec which requires "a secure transport established without errors". This vulnerability affects Firefox < 140 and Thunderbird < 140. |
03 Jul 2025, 16:04
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Mozilla firefox
Mozilla |
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| CPE | cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* | |
| References | () https://www.mozilla.org/security/advisories/mfsa2025-51/ - Vendor Advisory | |
| References | () https://bugzilla.mozilla.org/show_bug.cgi?id=1954033 - Permissions Required |
24 Jun 2025, 13:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-06-24 13:15
Updated : 2025-07-14 19:15
NVD link : CVE-2025-6433
Mitre link : CVE-2025-6433
JSON object : View
Products Affected
mozilla
- firefox
CWE
No CWE.