{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-6430", "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "state": "PUBLISHED", "assignerShortName": "mozilla", "dateReserved": "2025-06-20T14:51:35.561Z", "datePublished": "2025-06-24T12:28:01.020Z", "dateUpdated": "2026-04-13T14:30:45.145Z"}, "containers": {"cna": {"affected": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"status": "unaffected", "version": "128.12", "lessThanOrEqual": "128.*", "versionType": "rpm"}, {"status": "unaffected", "version": "140", "lessThanOrEqual": "*", "versionType": "rpm"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"status": "unaffected", "version": "128.12", "lessThanOrEqual": "128.*", "versionType": "rpm"}, {"status": "unaffected", "version": "140", "lessThanOrEqual": "*", "versionType": "rpm"}]}], "descriptions": [{"lang": "en", "value": "When a file download is specified via the `Content-Disposition` header, that directive would be ignored if the file was included via a `&lt;embed&gt;` or `&lt;object&gt;` tag, potentially making a website vulnerable to a cross-site scripting attack. This vulnerability was fixed in Firefox 140, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "When a file download is specified via the <code>Content-Disposition</code> header, that directive would be ignored if the file was included via a <code>&lt;embed&gt;</code> or <code>&lt;object&gt;</code> tag, potentially making a website vulnerable to a cross-site scripting attack. This vulnerability was fixed in Firefox 140, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12."}]}], "title": "Content-Disposition header ignored when a file is included in an embed or object tag", "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1971140"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-51/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-53/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-54/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-55/"}], "credits": [{"lang": "en", "value": "Daniil Satyaev (Positive Technologies)"}], "providerMetadata": {"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "shortName": "mozilla", "dateUpdated": "2026-04-13T14:30:45.145Z"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-79", "lang": "en", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}], "metrics": [{"cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2025-06-25T14:21:08.967871Z", "id": "CVE-2025-6430", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-06-25T14:28:07.992Z"}}, {"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/07/msg00002.html"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/06/msg00029.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:07:05.987Z"}}]}}

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*", "matchCriteriaId": "18420C6D-A5DF-41A4-8A81-F1BBFBA1BE2A", "versionEndExcluding": "128.12.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*", "matchCriteriaId": "77D2BF2A-26A3-4664-93B5-B41BCF17AC9E", "versionEndExcluding": "140.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "When a file download is specified via the `Content-Disposition` header, that directive would be ignored if the file was included via a `&lt;embed&gt;` or `&lt;object&gt;` tag, potentially making a website vulnerable to a cross-site scripting attack. This vulnerability was fixed in Firefox 140, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12."}, {"lang": "es", "value": "Cuando se especifica la descarga de un archivo mediante el encabezado `Content-Disposition`, esta directiva se ignora si el archivo se incluye mediante una etiqueta `` u ``, lo que podr\u00eda hacer que un sitio web sea vulnerable a un ataque de cross-site scripting. Esta vulnerabilidad afecta a Firefox &lt; 140 y Firefox ESR &lt; 128.12."}], "id": "CVE-2025-6430", "lastModified": "2026-04-13T15:17:07.260", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2025-06-24T13:15:23.993", "references": [{"source": "security@mozilla.org", "tags": ["Permissions Required"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1971140"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2025-51/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2025-53/"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2025-54/"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2025-55/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/06/msg00029.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/07/msg00002.html"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

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"product_name": "Red Hat Enterprise Linux 8", "release_date": "2025-07-02T00:00:00Z"}, {"advisory": "RHSA-2025:10166", "cpe": "cpe:/a:redhat:rhel_aus:8.2", "package": "thunderbird-0:128.12.0-1.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Advanced Update Support", "release_date": "2025-07-01T00:00:00Z"}, {"advisory": "RHSA-2025:10182", "cpe": "cpe:/a:redhat:rhel_aus:8.2", "package": "firefox-0:128.12.0-1.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Advanced Update Support", "release_date": "2025-07-02T00:00:00Z"}, {"advisory": "RHSA-2025:10165", "cpe": "cpe:/a:redhat:rhel_aus:8.4", "package": "thunderbird-0:128.12.0-1.el8_4", "product_name": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support", "release_date": "2025-07-01T00:00:00Z"}, {"advisory": "RHSA-2025:10184", "cpe": "cpe:/a:redhat:rhel_aus:8.4", "package": "firefox-0:128.12.0-1.el8_4", "product_name": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support", "release_date": "2025-07-02T00:00:00Z"}, {"advisory": "RHSA-2025:10164", "cpe": "cpe:/a:redhat:rhel_aus:8.6", "package": "thunderbird-0:128.12.0-1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support", "release_date": "2025-07-01T00:00:00Z"}, {"advisory": "RHSA-2025:10183", "cpe": "cpe:/a:redhat:rhel_aus:8.6", "package": "firefox-0:128.12.0-1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support", "release_date": "2025-07-02T00:00:00Z"}, {"advisory": "RHSA-2025:10164", "cpe": "cpe:/a:redhat:rhel_tus:8.6", "package": "thunderbird-0:128.12.0-1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Telecommunications Update Service", "release_date": "2025-07-01T00:00:00Z"}, {"advisory": "RHSA-2025:10183", "cpe": "cpe:/a:redhat:rhel_tus:8.6", "package": "firefox-0:128.12.0-1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Telecommunications Update Service", "release_date": "2025-07-02T00:00:00Z"}, {"advisory": "RHSA-2025:10164", "cpe": "cpe:/a:redhat:rhel_e4s:8.6", "package": "thunderbird-0:128.12.0-1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions", "release_date": "2025-07-01T00:00:00Z"}, {"advisory": "RHSA-2025:10183", "cpe": "cpe:/a:redhat:rhel_e4s:8.6", "package": "firefox-0:128.12.0-1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions", "release_date": "2025-07-02T00:00:00Z"}, {"advisory": "RHSA-2025:10163", "cpe": "cpe:/a:redhat:rhel_tus:8.8", "package": "thunderbird-0:128.12.0-1.el8_8", "product_name": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service", "release_date": "2025-07-01T00:00:00Z"}, {"advisory": "RHSA-2025:10186", "cpe": "cpe:/a:redhat:rhel_tus:8.8", "package": "firefox-0:128.12.0-1.el8_8", "product_name": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service", "release_date": "2025-07-02T00:00:00Z"}, {"advisory": "RHSA-2025:10163", "cpe": "cpe:/a:redhat:rhel_e4s:8.8", "package": "thunderbird-0:128.12.0-1.el8_8", "product_name": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions", "release_date": "2025-07-01T00:00:00Z"}, {"advisory": "RHSA-2025:10186", "cpe": "cpe:/a:redhat:rhel_e4s:8.8", "package": "firefox-0:128.12.0-1.el8_8", "product_name": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions", "release_date": "2025-07-02T00:00:00Z"}, {"advisory": "RHSA-2025:10072", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "firefox-0:128.12.0-1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-07-01T00:00:00Z"}, {"advisory": "RHSA-2025:10196", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "thunderbird-0:128.12.0-1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-07-02T00:00:00Z"}, {"advisory": "RHSA-2025:10161", "cpe": "cpe:/a:redhat:rhel_e4s:9.0", "package": "thunderbird-0:128.12.0-1.el9_0", "product_name": "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions", "release_date": "2025-07-01T00:00:00Z"}, {"advisory": "RHSA-2025:10187", "cpe": "cpe:/a:redhat:rhel_e4s:9.0", "package": "firefox-0:128.12.0-1.el9_0", "product_name": "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions", "release_date": "2025-07-02T00:00:00Z"}, {"advisory": "RHSA-2025:10160", "cpe": "cpe:/a:redhat:rhel_e4s:9.2", "package": "thunderbird-0:128.12.0-1.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions", "release_date": "2025-07-01T00:00:00Z"}, {"advisory": "RHSA-2025:10185", "cpe": "cpe:/a:redhat:rhel_e4s:9.2", "package": "firefox-0:128.12.0-1.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions", "release_date": "2025-07-02T00:00:00Z"}, {"advisory": "RHSA-2025:10159", "cpe": "cpe:/a:redhat:rhel_eus:9.4", "package": "thunderbird-0:128.12.0-1.el9_4", "product_name": "Red Hat Enterprise Linux 9.4 Extended Update Support", "release_date": "2025-07-01T00:00:00Z"}, {"advisory": "RHSA-2025:10188", "cpe": "cpe:/a:redhat:rhel_eus:9.4", "package": "firefox-0:128.12.0-1.el9_4", "product_name": "Red Hat Enterprise Linux 9.4 Extended Update Support", "release_date": "2025-07-02T00:00:00Z"}], "bugzilla": {"description": "firefox: thunderbird: Content-Disposition header ignored when a file is included in an embed or object tag", "id": "2374555", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2374555"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "status": "verified"}, "cwe": "CWE-79", "details": ["When a file download is specified via the `Content-Disposition` header, that directive would be ignored if the file was included via a `&lt;embed&gt;` or `&lt;object&gt;` tag, potentially making a website vulnerable to a cross-site scripting attack. This vulnerability affects Firefox < 140 and Firefox ESR < 128.12.", "A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: 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."], "name": "CVE-2025-6430", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "rhel10/firefox-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "rhel10/thunderbird-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 7"}], "public_date": "2025-06-24T12:28:01Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-6430\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-6430\nhttps://www.mozilla.org/security/advisories/mfsa2025-53/#CVE-2025-6430"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.", "threat_severity": "Moderate"}

{"analysis": {"en": {"generated_at": "2026-04-20T16:59:26.567107+00:00", "value": {"mitigation_remediation": ["Upgrade Mozilla Firefox to version 140 or later, or Firefox ESR 128.12 or newer. ", "Upgrade Mozilla Thunderbird to version 140 or later, or Thunderbird ESR 128.12 or newer. ", "If updates are unavailable, review web applications to avoid embedding downloadable content through <embed> or <object> tags that rely on the Content\u2011Disposition header. Remove or replace such tags with safer alternatives or ensure the header is not used for content delivered in this manner."], "summary": {"action": "Patch", "impact": "Cross\u2011Site Scripting"}, "threat_synthesis": {"affected_systems": "Mozilla Firefox versions prior to 140 and Firefox ESR 128.12, and Mozilla Thunderbird versions prior to 140 and Thunderbird ESR 128.12 are affected. The vulnerability may impact systems running these browsers, including installations on Red Hat Enterprise Linux 8, 9 and related extended roll\u2011up streams, as indicated by the CPE references. All affected browser instances should be evaluated for presence of the fault.", "description_and_impact": "When a file download is specified via a Content\u2011Disposition header, the header is ignored if the file is included in an embed or object tag. This oversight allows an attacker to inject malicious script into the page, leading to cross\u2011site scripting. The weakness is a form of script injection, identified as CWE\u201179, where user\u2011supplied header data is processed without proper sanitization.", "risk_and_exploitability": "The CVSS score of 6.1 signals moderate severity. The EPSS score of less than 1% indicates a very low probability of exploitation in the wild. The vulnerability is not listed in the CISA KEV catalog, suggesting no confirmed widespread attacks yet. Exploitation requires controlled web content that includes a downloadable file via embed or object tags, typically on sites that serve user\u2011uploaded media. An attacker with a malicious page or ability to influence webpage code could trigger the flaw to execute injected scripts in the victim\u2019s browser session."}}}}, "created": "2025-07-06T22:16:32.288622+00:00", "updated": "2026-04-20T17:00:12.762246+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox", "mozilla$PRODUCT$firefox_esr"]}