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.
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: HTTPS-Only exception screen lacked anti-clickjacking delay
References
Metrics threat_severity

None

threat_severity

Low


Wed, 25 Jun 2025 15:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1021
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 24 Jun 2025 12:45:00 +0000

Type Values Removed Values Added
Description 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.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2025-06-24T12:28:04.375Z

Updated: 2025-06-25T14:23:05.002Z

Reserved: 2025-06-20T14:51:40.757Z

Link: CVE-2025-6434

cve-icon Vulnrichment

Updated: 2025-06-25T14:20:24.853Z

cve-icon NVD

Status : Analyzed

Published: 2025-06-24T13:15:24.447

Modified: 2025-07-03T16:04:52.800

Link: CVE-2025-6434

cve-icon Redhat

Severity : Low

Publid Date: 2025-06-24T12:28:04Z

Links: CVE-2025-6434 - Bugzilla