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.
Metrics
Affected Vendors & Products
References
History
Thu, 03 Jul 2025 16:30:00 +0000
Type | Values Removed | Values Added |
---|---|---|
First Time appeared |
Mozilla
Mozilla firefox |
|
CPEs | cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* | |
Vendors & Products |
Mozilla
Mozilla firefox |
Thu, 26 Jun 2025 00:30:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Title | firefox: WebAuthn would allow a user to sign a challenge on a webpage with an invalid TLS certificate | |
References |
| |
Metrics |
threat_severity
|
threat_severity
|
Wed, 25 Jun 2025 13:15:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Weaknesses | CWE-295 | |
Metrics |
cvssV3_1
|
Tue, 24 Jun 2025 12:45:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Description | 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. | |
References |
|

Status: PUBLISHED
Assigner: mozilla
Published: 2025-06-24T12:28:04.065Z
Updated: 2025-06-25T12:41:50.340Z
Reserved: 2025-06-20T14:51:39.059Z
Link: CVE-2025-6433

Updated: 2025-06-25T12:32:33.301Z

Status : Analyzed
Published: 2025-06-24T13:15:24.327
Modified: 2025-07-03T16:04:41.260
Link: CVE-2025-6433
