CVE-2025-6433
 
Severity Score
9.8
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
Attend
*SSVC
Descriptions
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.
*Credits:
Simon
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:Attend
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2025-06-20 CVE Reserved
- 2025-06-24 CVE Published
- 2025-06-25 CVE Updated
- 2025-06-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-295: Improper Certificate Validation
CAPEC
References (2)
URL | Tag | Source |
---|---|---|
https://bugzilla.mozilla.org/show_bug.cgi?id=1954033 | ||
https://www.mozilla.org/security/advisories/mfsa2025-51 |
URL | Date | SRC |
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URL | Date | SRC |
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URL | Date | SRC |
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Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Mozilla Search vendor "Mozilla" | Firefox Search vendor "Mozilla" for product "Firefox" | * | - |
Affected
| ||||||
Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | * | - |
Affected
| ||||||
Slackware Search vendor "Slackware" | Slackware Linux Search vendor "Slackware" for product "Slackware Linux" | * | - |
Affected
|