CVE-2025-5269

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{"affected": [{"affectedData": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"lessThanOrEqual": "*", "status": "unaffected", "version": "128.11", "versionType": "rpm"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"lessThanOrEqual": "*", "status": "unaffected", "version": "128.11", "versionType": "rpm"}]}], "source": "security@mozilla.org"}], "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:thunderbird:*:*:*:*:*:*:*:*", "matchCriteriaId": "1495D4C0-92D7-4384-8730-B59560AD0BEE", "versionEndExcluding": "128.11.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Memory safety bug present in Firefox ESR 128.10, and Thunderbird 128.10. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 128.11 and Thunderbird 128.11."}, {"lang": "es", "value": "Error de seguridad de memoria presente en Firefox ESR 128.10 y Thunderbird 128.10. Este error mostr\u00f3 evidencia de corrupci\u00f3n de memoria y presumimos que, con suficiente esfuerzo, podr\u00eda haberse explotado para ejecutar c\u00f3digo arbitrario. Esta vulnerabilidad afecta a Firefox ESR menor que 128.11."}], "id": "CVE-2025-5269", "lastModified": "2026-10-05T15:10:00.590", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-5269", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-05-27T17:41:18.340090Z", "version": "2.0.3"}}]}, "published": "2025-05-27T13:15:22.717", "references": [{"source": "security@mozilla.org", "tags": ["Permissions Required"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1924108"}, {"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/mfsa2025-46/"}, {"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-787"}], "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: Memory safety bug", "id": "2368757", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2368757"}, "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-119", "details": ["Memory safety bug present in Firefox ESR 128.10, and Thunderbird 128.10. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 128.11 and Thunderbird < 128.11.", "A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: This bug shows evidence of memory corruption and we presume that with enough effort this could be exploited to run arbitrary code."], "name": "CVE-2025-5269", "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": "2025-05-27T12:29:27Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-5269\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-5269\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2025-44/#CVE-2025-5269\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2025-46/#CVE-2025-5269"], "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": "2026-04-20T17:05:01.582830+00:00", "value": {"mitigation_remediation": ["Update Firefox ESR to version 128.11 or later, following Mozilla\u2019s official security advisory.", "Update Thunderbird to version 128.11 or later, following Mozilla\u2019s official security advisory.", "If immediate update is not possible, restrict or quarantine environments from loading untrusted web pages or email attachments until the patch can be applied."], "summary": {"action": "Apply Patch", "impact": "Memory corruption with potential for arbitrary code execution"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Mozilla Firefox ESR and Thunderbird versions 128.10. Users running these specific revision numbers are at risk; the problem has been addressed in the subsequent 128.11 updates.", "description_and_impact": "A memory safety bug was identified in Firefox ESR 128.10 and Thunderbird 128.10, causing memory corruption that could allow an attacker to execute arbitrary code. The flaw involves unsafe handling of data (CWE-119, CWE-787) and has been fixed in the 128.11 releases.", "risk_and_exploitability": "The CVSS score of 8.1 indicates a high-severity vulnerability, while the EPSS score of less than 1% suggests a very low probability of exploitation in the wild. The flaw is not listed in the CISA KEV catalog. Although the attack vector is not explicitly documented, it can be inferred that malicious web content or email attachments could trigger the vulnerable memory handling, leading to execution of attacker\u2011chosen code if the conditions are met."}}}}, "created": "2026-04-20T17:15:12.548298+00:00", "updated": "2026-04-20T17:15:12.548308+00:00", "vendors": []}