The exception page for the HTTPS-Only feature, displayed when a website is opened via HTTP, lacked an anti-clickjacking delay, potentially allowing an attacker to trick a user into granting an exception and loading a webpage over HTTP. This vulnerability affects Firefox < 140 and Thunderbird < 140.
CVSS
No CVSS.
References
| Link | Resource |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1955182 | 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 |
|---|---|---|
| Summary | The exception page for the HTTPS-Only feature, displayed when a website is opened via HTTP, lacked an anti-clickjacking delay, potentially allowing an attacker to trick a user into granting an exception and loading a webpage over HTTP. This vulnerability affects Firefox < 140 and Thunderbird < 140. | |
| References |
|
03 Jul 2025, 16:04
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://www.mozilla.org/security/advisories/mfsa2025-51/ - Vendor Advisory | |
| References | () https://bugzilla.mozilla.org/show_bug.cgi?id=1955182 - Permissions Required | |
| First Time |
Mozilla firefox
Mozilla |
|
| CPE | cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* |
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-2025-6434
Mitre link : CVE-2025-6434
JSON object : View
Products Affected
mozilla
- firefox
CWE
No CWE.