{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-5266", "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "state": "PUBLISHED", "assignerShortName": "mozilla", "dateReserved": "2025-05-27T12:29:24.726Z", "datePublished": "2025-05-27T12:29:25.084Z", "dateUpdated": "2025-11-03T20:06:04.324Z"}, "containers": {"cna": {"affected": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"lessThan": "139", "status": "affected", "version": "unspecified", "versionType": "custom"}]}, {"product": "Firefox ESR", "vendor": "Mozilla", "versions": [{"lessThan": "128.11", "status": "affected", "version": "unspecified", "versionType": "custom"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"lessThan": "139", "status": "affected", "version": "unspecified", "versionType": "custom"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"lessThan": "128.11", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. This vulnerability affects Firefox < 139, Firefox ESR < 128.11, Thunderbird < 139, and Thunderbird < 128.11.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. This vulnerability affects Firefox < 139, Firefox ESR < 128.11, Thunderbird < 139, and Thunderbird < 128.11."}]}], "title": "Script element events leaked cross-origin resource status", "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1965628"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-42/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-44/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-45/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-46/"}], "credits": [{"lang": "en", "value": "Jakub Szymsza"}], "providerMetadata": {"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "shortName": "mozilla", "dateUpdated": "2025-10-30T16:11:11.598Z"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-200", "lang": "en", "description": "CWE-200 Exposure of Sensitive Information to an Unauthorized Actor"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2025-09-23T14:44:04.447377Z", "id": "CVE-2025-5266", "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": "2025-09-23T14:44:14.612Z"}}, {"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00043.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:06:04.324Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00043.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:06:04.324Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2025-5266", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-09-23T14:44:04.447377Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-200", "description": "CWE-200 Exposure of Sensitive Information to an Unauthorized Actor"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-05-27T17:46:33.235Z"}}], "cna": {"title": "Script element events leaked cross-origin resource status", "credits": [{"lang": "en", "value": "Jakub Szymsza"}], "affected": [{"vendor": "Mozilla", "product": "Firefox", "versions": [{"status": "affected", "version": "unspecified", "lessThan": "139", "versionType": "custom"}]}, {"vendor": "Mozilla", "product": "Firefox ESR", "versions": [{"status": "affected", "version": "unspecified", "lessThan": "128.11", "versionType": "custom"}]}, {"vendor": "Mozilla", "product": "Thunderbird", "versions": [{"status": "affected", "version": "unspecified", "lessThan": "139", "versionType": "custom"}]}, {"vendor": "Mozilla", "product": "Thunderbird", "versions": [{"status": "affected", "version": "unspecified", "lessThan": "128.11", "versionType": "custom"}]}], "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1965628"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-42/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-44/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-45/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-46/"}], "descriptions": [{"lang": "en", "value": "Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. This vulnerability affects Firefox < 139, Firefox ESR < 128.11, Thunderbird < 139, and Thunderbird < 128.11.", "supportingMedia": [{"type": "text/html", "value": "Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. This vulnerability affects Firefox < 139, Firefox ESR < 128.11, Thunderbird < 139, and Thunderbird < 128.11.", "base64": false}]}], "providerMetadata": {"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "shortName": "mozilla", "dateUpdated": "2025-10-30T16:11:11.598Z"}}}, "cveMetadata": {"cveId": "CVE-2025-5266", "state": "PUBLISHED", "dateUpdated": "2025-11-03T20:06:04.324Z", "dateReserved": "2025-05-27T12:29:24.726Z", "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "datePublished": "2025-05-27T12:29:25.084Z", "assignerShortName": "mozilla"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*", "matchCriteriaId": "4BA097AB-46D1-4C4E-9856-9109237940C3", "versionEndExcluding": "128.11.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*", "matchCriteriaId": "E2C0FE7C-6F8E-4F1D-A768-914194586E0C", "versionEndExcluding": "139.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. This vulnerability affects Firefox < 139, Firefox ESR < 128.11, Thunderbird < 139, and Thunderbird < 128.11."}, {"lang": "es", "value": "Los elementos de script que cargaban recursos de origen cruzado generaban eventos de carga y error que filtraban informaci\u00f3n, lo que facilitaba los ataques XS-Leaks. Esta vulnerabilidad afecta a Firefox &lt; 139 y Firefox ESR &lt; 128.11."}], "id": "CVE-2025-5266", "lastModified": "2025-11-03T20:19:16.240", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2025-05-27T13:15:22.403", "references": [{"source": "security@mozilla.org", "tags": ["Permissions Required"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1965628"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2025-42/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2025-44/"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2025-45/"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2025-46/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00043.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2025:8341", "cpe": "cpe:/o:redhat:enterprise_linux:10.0", "package": "firefox-0:128.11.0-1.el10_0", "product_name": "Red Hat Enterprise Linux 10", "release_date": "2025-06-02T00:00:00Z"}, {"advisory": "RHSA-2025:8608", "cpe": "cpe:/o:redhat:enterprise_linux:10.0", "package": "thunderbird-0:128.11.0-1.el10_0", "product_name": "Red Hat Enterprise Linux 10", "release_date": "2025-06-05T00:00:00Z"}, {"advisory": "RHSA-2025:9074", "cpe": "cpe:/o:redhat:rhel_els:7", "package": "firefox-0:128.11.0-1.el7_9", "product_name": "Red Hat Enterprise Linux 7 Extended Lifecycle Support", "release_date": "2025-06-16T00:00:00Z"}, {"advisory": "RHSA-2025:8308", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "firefox-0:128.11.0-1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2025-05-29T00:00:00Z"}, {"advisory": "RHSA-2025:8756", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "thunderbird-0:128.11.0-1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2025-06-10T00:00:00Z"}, {"advisory": "RHSA-2025:8631", "cpe": "cpe:/a:redhat:rhel_aus:8.2", "package": "thunderbird-0:128.11.0-1.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Advanced Update Support", "release_date": "2025-06-09T00:00:00Z"}, {"advisory": "RHSA-2025:9075", "cpe": "cpe:/a:redhat:rhel_aus:8.2", "package": "firefox-0:128.11.0-1.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Advanced Update Support", "release_date": "2025-06-16T00:00:00Z"}, {"advisory": "RHSA-2025:8630", "cpe": "cpe:/a:redhat:rhel_aus:8.4", "package": "thunderbird-0:128.11.0-1.el8_4", "product_name": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support", "release_date": "2025-06-09T00:00:00Z"}, {"advisory": "RHSA-2025:9076", "cpe": "cpe:/a:redhat:rhel_aus:8.4", "package": "firefox-0:128.11.0-1.el8_4", "product_name": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support", "release_date": "2025-06-16T00:00:00Z"}, {"advisory": "RHSA-2025:8629", "cpe": "cpe:/a:redhat:rhel_aus:8.6", "package": "thunderbird-0:128.11.0-1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support", "release_date": "2025-06-09T00:00:00Z"}, {"advisory": "RHSA-2025:9155", "cpe": "cpe:/a:redhat:rhel_aus:8.6", "package": "firefox-0:128.11.0-1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support", "release_date": "2025-06-17T00:00:00Z"}, {"advisory": "RHSA-2025:8629", "cpe": "cpe:/a:redhat:rhel_tus:8.6", "package": "thunderbird-0:128.11.0-1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Telecommunications Update Service", "release_date": "2025-06-09T00:00:00Z"}, {"advisory": "RHSA-2025:9155", "cpe": "cpe:/a:redhat:rhel_tus:8.6", "package": "firefox-0:128.11.0-1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Telecommunications Update Service", "release_date": "2025-06-17T00:00:00Z"}, {"advisory": "RHSA-2025:8629", "cpe": "cpe:/a:redhat:rhel_e4s:8.6", "package": "thunderbird-0:128.11.0-1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions", "release_date": "2025-06-09T00:00:00Z"}, {"advisory": "RHSA-2025:9155", "cpe": "cpe:/a:redhat:rhel_e4s:8.6", "package": "firefox-0:128.11.0-1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions", "release_date": "2025-06-17T00:00:00Z"}, {"advisory": "RHSA-2025:8628", "cpe": "cpe:/a:redhat:rhel_tus:8.8", "package": "thunderbird-0:128.11.0-1.el8_8", "product_name": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service", "release_date": "2025-06-09T00:00:00Z"}, {"advisory": "RHSA-2025:8628", "cpe": "cpe:/a:redhat:rhel_e4s:8.8", "package": "thunderbird-0:128.11.0-1.el8_8", "product_name": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions", "release_date": "2025-06-09T00:00:00Z"}, {"advisory": "RHSA-2025:9077", "cpe": "cpe:/a:redhat:rhel_e4s:8.8", "package": "firefox-0:128.11.0-1.el8_8", "product_name": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions", "release_date": "2025-06-16T00:00:00Z"}, {"advisory": "RHSA-2025:8293", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "firefox-0:128.11.0-1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-29T00:00:00Z"}, {"advisory": "RHSA-2025:8607", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "thunderbird-0:128.11.0-1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-06-05T00:00:00Z"}, {"advisory": "RHSA-2025:8598", "cpe": "cpe:/a:redhat:rhel_e4s:9.0", "package": "thunderbird-0:128.11.0-1.el9_0", "product_name": "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions", "release_date": "2025-06-05T00:00:00Z"}, {"advisory": "RHSA-2025:9073", "cpe": "cpe:/a:redhat:rhel_e4s:9.0", "package": "firefox-0:128.11.0-1.el9_0", "product_name": "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions", "release_date": "2025-06-16T00:00:00Z"}, {"advisory": "RHSA-2025:8642", "cpe": "cpe:/a:redhat:rhel_e4s:9.2", "package": "thunderbird-0:128.11.0-1.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions", "release_date": "2025-06-09T00:00:00Z"}, {"advisory": "RHSA-2025:9071", "cpe": "cpe:/a:redhat:rhel_e4s:9.2", "package": "firefox-0:128.11.0-1.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions", "release_date": "2025-06-16T00:00:00Z"}, {"advisory": "RHSA-2025:8599", "cpe": "cpe:/a:redhat:rhel_eus:9.4", "package": "thunderbird-0:128.11.0-1.el9_4", "product_name": "Red Hat Enterprise Linux 9.4 Extended Update Support", "release_date": "2025-06-05T00:00:00Z"}, {"advisory": "RHSA-2025:9072", "cpe": "cpe:/a:redhat:rhel_eus:9.4", "package": "firefox-0:128.11.0-1.el9_4", "product_name": "Red Hat Enterprise Linux 9.4 Extended Update Support", "release_date": "2025-06-16T00:00:00Z"}], "bugzilla": {"description": "firefox: thunderbird: Script element events leaked cross-origin resource status", "id": "2368755", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2368755"}, "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-829", "details": ["Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. This vulnerability affects Firefox < 139, Firefox ESR < 128.11, Thunderbird < 139, and Thunderbird < 128.11.", "A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: Script elements loading cross-origin resources generate load and error events which can leak information enabling XS-Leaks attacks."], "name": "CVE-2025-5266", "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": "2025-05-27T12:29:25Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-5266\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-5266\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2025-44/#CVE-2025-5266\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2025-46/#CVE-2025-5266"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.", "threat_severity": "Moderate"}

{}