{"id":"CVE-2025-6430","details":"When a file download is specified via the `Content-Disposition` header, that directive would be ignored if the file was included via a `<embed>` or `<object>` tag, potentially making a website vulnerable to a cross-site scripting attack. This vulnerability affects Firefox \u003c 140, Firefox ESR \u003c 128.12, Thunderbird \u003c 140, and Thunderbird \u003c 128.12.","modified":"2026-07-01T12:48:28.059299401Z","published":"2025-06-24T13:15:23.993Z","related":["ALSA-2025:10072","ALSA-2025:10073","ALSA-2025:10074","CGA-xxhh-68xh-4fgm","SUSE-SU-2025:02122-1","SUSE-SU-2025:02123-1","SUSE-SU-2025:02339-1","SUSE-SU-2025:02368-1","SUSE-SU-2025:02529-1","SUSE-SU-2025:02546-1","SUSE-SU-2025:21170-1","openSUSE-SU-2025:15216-1","openSUSE-SU-2025:15312-1","openSUSE-SU-2025:15315-1","openSUSE-SU-2025:15325-1","openSUSE-SU-2025:20135-1"],"references":[{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/06/msg00029.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/07/msg00002.html"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2025-54/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2025-55/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2025-51/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2025-53/"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1971140"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-6430.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"128.12.0"}]},{"events":[{"introduced":"0"},{"fixed":"140.0"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"}]}