Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

zetlyn/cve-nvd vulnerability cve CVE-2025-5264 cpe cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* cpe cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* known 2025-05-27

https://nvd.nist.gov/vuln/detail/CVE-2025-5264

Properties

cvss	4.8 receipt Source NVD Its words `4.8` Read by `field:cve.metrics.cvssMetricV31[].cvssData.baseScore` Said since 2026-10-02 12:00 UTC Last answered 2026-10-05 12:24 UTC Original open at the source What the source handed over { "cve": { "affected": [ { "affectedData": [ { "product": "Firefox", "vendor": "Mozilla", "versions": [ { "lessThanOrEqual": "115.", "status": "unaffected", "version": "115.24", "versionType": "rpm" }, { "lessThanOrEqual": "128.", "status": "unaffected", "version": "128.11", "versionType": "rpm" }, { "lessThanOrEqual": "", "status": "unaffected", "version": "139", "versionType": "rpm" } ] }, { "product": "Thunderbird", "vendor": "Mozilla", "versions": [ { "lessThanOrEqual": "128.", "status": "unaffected", "version": "128.11", "versionType": "rpm" }, { "lessThanOrEqual": "", "status": "unaffected", "version": "139", "versionType": "rpm" } ] } ], "source": "security@mozilla.org" } ], "configurations": [ { "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:a:mozilla:firefox:::::esr:::", "matchCriteriaId": "062A22E3-C6FE-4948-98F5-217EFE0638FC", "versionEndExcluding": "115.24.0", "vulnerable": true }, { "criteria": "cpe:2.3:a:mozilla:firefox:::::-:::", "matchCriteriaId": "E2C0FE7C-6F8E-4F1D-A768-914194586E0C", "versionEndExcluding": "139.0", "vulnerable": true }, { "criteria": "cpe:2.3:a:mozilla:firefox:::::esr:::", "matchCriteriaId": "DA9173F0-1559-4152-9B7F-30ABCF70BE80", "versionEndExcluding": "128.11.0", "versionStartIncluding": "116.0", "vulnerable": true } ], "negate": false, "operator": "OR" } ] } ], "cveTags": [], "descriptions": [ { "lang": "en", "value": "Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11." }, { "lang": "es", "value": "Debido a la insuficiente capacidad de escape del carácter de nueva línea en la función “Copiar como cURL”, un atacante podría engañar a un usuario para que use este comando, lo que podría provocar la ejecución de código local en su sistema. Esta vulnerabilidad afecta a Firefox < 139, Firefox ESR < 115.24 y Firefox ESR < 128.11." } ], "id": "CVE-2025-5264", "lastModified": "2026-09-30T18:10:00.190", "metrics": { "cvssMetricV31": [ { "cvssData": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 4.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L", "version": "3.1" }, "exploitabilityScore": 1.3, "impactScore": 3.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary" } ], "ssvcV203": [ { "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": { "id": "CVE-2025-5264", "options": [ { "exploitation": "none" }, { "automatable": "no" }, { "technicalImpact": "total" } ], "role": "CISA Coordinator", "timestamp": "2025-05-28T03:55:59.370030Z", "version": "2.0.3" } } ] }, "published": "2025-05-27T13:15:22.200", "references": [ { "source": "security@mozilla.org", "tags": [ "Permissions Required" ], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1950001" }, { "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/mfsa2025-43/" }, { "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-77" } ], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary" } ] } }
product	Firefox receipt Source NVD Its words `Firefox` Read by `field:cve.affected[].affectedData[].product` Said since 2026-10-02 12:00 UTC Last answered 2026-10-05 12:24 UTC Original open at the source What the source handed over { "cve": { "affected": [ { "affectedData": [ { "product": "Firefox", "vendor": "Mozilla", "versions": [ { "lessThanOrEqual": "115.", "status": "unaffected", "version": "115.24", "versionType": "rpm" }, { "lessThanOrEqual": "128.", "status": "unaffected", "version": "128.11", "versionType": "rpm" }, { "lessThanOrEqual": "", "status": "unaffected", "version": "139", "versionType": "rpm" } ] }, { "product": "Thunderbird", "vendor": "Mozilla", "versions": [ { "lessThanOrEqual": "128.", "status": "unaffected", "version": "128.11", "versionType": "rpm" }, { "lessThanOrEqual": "", "status": "unaffected", "version": "139", "versionType": "rpm" } ] } ], "source": "security@mozilla.org" } ], "configurations": [ { "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:a:mozilla:firefox:::::esr:::", "matchCriteriaId": "062A22E3-C6FE-4948-98F5-217EFE0638FC", "versionEndExcluding": "115.24.0", "vulnerable": true }, { "criteria": "cpe:2.3:a:mozilla:firefox:::::-:::", "matchCriteriaId": "E2C0FE7C-6F8E-4F1D-A768-914194586E0C", "versionEndExcluding": "139.0", "vulnerable": true }, { "criteria": "cpe:2.3:a:mozilla:firefox:::::esr:::", "matchCriteriaId": "DA9173F0-1559-4152-9B7F-30ABCF70BE80", "versionEndExcluding": "128.11.0", "versionStartIncluding": "116.0", "vulnerable": true } ], "negate": false, "operator": "OR" } ] } ], "cveTags": [], "descriptions": [ { "lang": "en", "value": "Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11." }, { "lang": "es", "value": "Debido a la insuficiente capacidad de escape del carácter de nueva línea en la función “Copiar como cURL”, un atacante podría engañar a un usuario para que use este comando, lo que podría provocar la ejecución de código local en su sistema. Esta vulnerabilidad afecta a Firefox < 139, Firefox ESR < 115.24 y Firefox ESR < 128.11." } ], "id": "CVE-2025-5264", "lastModified": "2026-09-30T18:10:00.190", "metrics": { "cvssMetricV31": [ { "cvssData": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 4.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L", "version": "3.1" }, "exploitabilityScore": 1.3, "impactScore": 3.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary" } ], "ssvcV203": [ { "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": { "id": "CVE-2025-5264", "options": [ { "exploitation": "none" }, { "automatable": "no" }, { "technicalImpact": "total" } ], "role": "CISA Coordinator", "timestamp": "2025-05-28T03:55:59.370030Z", "version": "2.0.3" } } ] }, "published": "2025-05-27T13:15:22.200", "references": [ { "source": "security@mozilla.org", "tags": [ "Permissions Required" ], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1950001" }, { "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/mfsa2025-43/" }, { "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-77" } ], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary" } ] } }
status	Modified receipt Source NVD Its words `Modified` Read by `field:cve.vulnStatus` Said since 2026-10-02 12:00 UTC Last answered 2026-10-05 12:24 UTC Original open at the source What the source handed over { "cve": { "affected": [ { "affectedData": [ { "product": "Firefox", "vendor": "Mozilla", "versions": [ { "lessThanOrEqual": "115.", "status": "unaffected", "version": "115.24", "versionType": "rpm" }, { "lessThanOrEqual": "128.", "status": "unaffected", "version": "128.11", "versionType": "rpm" }, { "lessThanOrEqual": "", "status": "unaffected", "version": "139", "versionType": "rpm" } ] }, { "product": "Thunderbird", "vendor": "Mozilla", "versions": [ { "lessThanOrEqual": "128.", "status": "unaffected", "version": "128.11", "versionType": "rpm" }, { "lessThanOrEqual": "", "status": "unaffected", "version": "139", "versionType": "rpm" } ] } ], "source": "security@mozilla.org" } ], "configurations": [ { "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:a:mozilla:firefox:::::esr:::", "matchCriteriaId": "062A22E3-C6FE-4948-98F5-217EFE0638FC", "versionEndExcluding": "115.24.0", "vulnerable": true }, { "criteria": "cpe:2.3:a:mozilla:firefox:::::-:::", "matchCriteriaId": "E2C0FE7C-6F8E-4F1D-A768-914194586E0C", "versionEndExcluding": "139.0", "vulnerable": true }, { "criteria": "cpe:2.3:a:mozilla:firefox:::::esr:::", "matchCriteriaId": "DA9173F0-1559-4152-9B7F-30ABCF70BE80", "versionEndExcluding": "128.11.0", "versionStartIncluding": "116.0", "vulnerable": true } ], "negate": false, "operator": "OR" } ] } ], "cveTags": [], "descriptions": [ { "lang": "en", "value": "Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11." }, { "lang": "es", "value": "Debido a la insuficiente capacidad de escape del carácter de nueva línea en la función “Copiar como cURL”, un atacante podría engañar a un usuario para que use este comando, lo que podría provocar la ejecución de código local en su sistema. Esta vulnerabilidad afecta a Firefox < 139, Firefox ESR < 115.24 y Firefox ESR < 128.11." } ], "id": "CVE-2025-5264", "lastModified": "2026-09-30T18:10:00.190", "metrics": { "cvssMetricV31": [ { "cvssData": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 4.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L", "version": "3.1" }, "exploitabilityScore": 1.3, "impactScore": 3.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary" } ], "ssvcV203": [ { "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": { "id": "CVE-2025-5264", "options": [ { "exploitation": "none" }, { "automatable": "no" }, { "technicalImpact": "total" } ], "role": "CISA Coordinator", "timestamp": "2025-05-28T03:55:59.370030Z", "version": "2.0.3" } } ] }, "published": "2025-05-27T13:15:22.200", "references": [ { "source": "security@mozilla.org", "tags": [ "Permissions Required" ], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1950001" }, { "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/mfsa2025-43/" }, { "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-77" } ], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary" } ] } }
vendor	Mozilla receipt Source NVD Its words `Mozilla` Read by `field:cve.affected[].affectedData[].vendor` Said since 2026-10-02 12:00 UTC Last answered 2026-10-05 12:24 UTC Original open at the source What the source handed over { "cve": { "affected": [ { "affectedData": [ { "product": "Firefox", "vendor": "Mozilla", "versions": [ { "lessThanOrEqual": "115.", "status": "unaffected", "version": "115.24", "versionType": "rpm" }, { "lessThanOrEqual": "128.", "status": "unaffected", "version": "128.11", "versionType": "rpm" }, { "lessThanOrEqual": "", "status": "unaffected", "version": "139", "versionType": "rpm" } ] }, { "product": "Thunderbird", "vendor": "Mozilla", "versions": [ { "lessThanOrEqual": "128.", "status": "unaffected", "version": "128.11", "versionType": "rpm" }, { "lessThanOrEqual": "", "status": "unaffected", "version": "139", "versionType": "rpm" } ] } ], "source": "security@mozilla.org" } ], "configurations": [ { "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:a:mozilla:firefox:::::esr:::", "matchCriteriaId": "062A22E3-C6FE-4948-98F5-217EFE0638FC", "versionEndExcluding": "115.24.0", "vulnerable": true }, { "criteria": "cpe:2.3:a:mozilla:firefox:::::-:::", "matchCriteriaId": "E2C0FE7C-6F8E-4F1D-A768-914194586E0C", "versionEndExcluding": "139.0", "vulnerable": true }, { "criteria": "cpe:2.3:a:mozilla:firefox:::::esr:::", "matchCriteriaId": "DA9173F0-1559-4152-9B7F-30ABCF70BE80", "versionEndExcluding": "128.11.0", "versionStartIncluding": "116.0", "vulnerable": true } ], "negate": false, "operator": "OR" } ] } ], "cveTags": [], "descriptions": [ { "lang": "en", "value": "Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11." }, { "lang": "es", "value": "Debido a la insuficiente capacidad de escape del carácter de nueva línea en la función “Copiar como cURL”, un atacante podría engañar a un usuario para que use este comando, lo que podría provocar la ejecución de código local en su sistema. Esta vulnerabilidad afecta a Firefox < 139, Firefox ESR < 115.24 y Firefox ESR < 128.11." } ], "id": "CVE-2025-5264", "lastModified": "2026-09-30T18:10:00.190", "metrics": { "cvssMetricV31": [ { "cvssData": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 4.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L", "version": "3.1" }, "exploitabilityScore": 1.3, "impactScore": 3.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary" } ], "ssvcV203": [ { "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": { "id": "CVE-2025-5264", "options": [ { "exploitation": "none" }, { "automatable": "no" }, { "technicalImpact": "total" } ], "role": "CISA Coordinator", "timestamp": "2025-05-28T03:55:59.370030Z", "version": "2.0.3" } } ] }, "published": "2025-05-27T13:15:22.200", "references": [ { "source": "security@mozilla.org", "tags": [ "Permissions Required" ], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1950001" }, { "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/mfsa2025-43/" }, { "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-77" } ], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary" } ] } }

Text

Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11. Debido a la insuficiente capacidad de escape del carácter de nueva línea en la función “Copiar como cURL”, un atacante podría engañar a un usuario para que use este comando, lo que podría provocar la ejecución de código local en su sistema. Esta vulnerabilidad afecta a Firefox < 139, Firefox ESR < 115.24 y Firefox ESR < 128.11.