{"id":"CVE-2025-6434","details":"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 \u003c 140 and Thunderbird \u003c 140.","modified":"2026-05-04T08:47:27.406478Z","published":"2025-06-24T13:15:24.447Z","withdrawn":"2026-05-04T08:47:27.406478Z","related":["SUSE-SU-2025:02339-1","SUSE-SU-2025:02529-1","SUSE-SU-2025:02546-1","openSUSE-SU-2025:15325-1","openSUSE-SU-2025:15371-1","openSUSE-SU-2025:15383-1"],"references":[{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2025-51/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2025-54/"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1955182"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"140.0"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-6434.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N"}]}