CVE-2019-10909
In Symfony before 2.7.51, 2.8.x before 2.8.50, 3.x before 3.4.26, 4.x before 4.1.12, and 4.2.x before 4.2.7, validation messages are not escaped, which can lead to XSS when user input is included. This is related to symfony/framework-bundle.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- Puntuación base: 5.4
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 1.03%
- Percentil entre todas las CVEs puntuadas: 63
- Fecha de la puntuación: 7/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
💥 Exploits públicos
Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.
- Prueba de concepto en GitHub (no verificada) · Lista de pruebas de concepto en GitHub
⚠️ Las pruebas de concepto de GitHub no están verificadas: algunas son falsas o contienen malware. No las ejecute nunca fuera de un laboratorio aislado.
Tecnologías afectadas (2)
CWE
- CWE-79
Referencias
- https://github.com/symfony/symfony/commit/ab4d05358c3d0dd1a36fc8c306829f68e3dd84e2
- https://symfony.com/blog/cve-2019-10909-escape-validation-messages-in-the-php-templating-engine
- https://www.drupal.org/sa-core-2019-005
- https://www.synology.com/security/advisory/Synology_SA_19_19
- https://github.com/symfony/symfony/commit/ab4d05358c3d0dd1a36fc8c306829f68e3dd84e2
- https://symfony.com/blog/cve-2019-10909-escape-validation-messages-in-the-php-templating-engine
- https://www.drupal.org/sa-core-2019-005
- https://www.synology.com/security/advisory/Synology_SA_19_19
JSON original (NVD)
Mostrar
{
"id": "CVE-2019-10909",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 3.5,
"accessVector": "NETWORK",
"vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N",
"authentication": "SINGLE",
"integrityImpact": "PARTIAL",
"accessComplexity": "MEDIUM",
"availabilityImpact": "NONE",
"confidentialityImpact": "NONE"
},
"acInsufInfo": false,
"impactScore": 2.9,
"baseSeverity": "LOW",
"obtainAllPrivilege": false,
"exploitabilityScore": 6.8,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": true
}
],
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "CHANGED",
"version": "3.1",
"baseScore": 5.4,
"attackVector": "NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
"integrityImpact": "LOW",
"userInteraction": "REQUIRED",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "LOW",
"confidentialityImpact": "LOW"
},
"impactScore": 2.7,
"exploitabilityScore": 2.3
}
]
},
"affected": [
{
"source": "cve@mitre.org",
"affectedData": [
{
"vendor": "n/a",
"product": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
]
}
],
"published": "2019-05-16T22:29:00.283",
"references": [
{
"url": "https://github.com/symfony/symfony/commit/ab4d05358c3d0dd1a36fc8c306829f68e3dd84e2",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://symfony.com/blog/cve-2019-10909-escape-validation-messages-in-the-php-templating-engine",
"tags": [
"Vendor Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://www.drupal.org/sa-core-2019-005",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://www.synology.com/security/advisory/Synology_SA_19_19",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://github.com/symfony/symfony/commit/ab4d05358c3d0dd1a36fc8c306829f68e3dd84e2",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://symfony.com/blog/cve-2019-10909-escape-validation-messages-in-the-php-templating-engine",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.drupal.org/sa-core-2019-005",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.synology.com/security/advisory/Synology_SA_19_19",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-79"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In Symfony before 2.7.51, 2.8.x before 2.8.50, 3.x before 3.4.26, 4.x before 4.1.12, and 4.2.x before 4.2.7, validation messages are not escaped, which can lead to XSS when user input is included. This is related to symfony/framework-bundle."
},
{
"lang": "es",
"value": "En Symfony anterior de la versión 2.7.51, versión 2.8.x anterior de 2.8.50, versión 3.x anterior de 3.4.26, versión 4.x anterior de 4.1.12 y versión 4.2.x anterior de 4.2.7, los mensajes de validación no son evadidos, lo que puede llevar a una vulnerabilidad de XSS cuando una entrada del usuario sea incluida. Esto está relacionado con symfony/framework-bundle"
}
],
"lastModified": "2026-06-17T02:11:52.753",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A86884C0-A185-4CCF-AB21-1D1529AEDAED",
"versionEndExcluding": "2.7.51",
"versionStartIncluding": "2.7.0"
},
{
"criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A4716654-1055-44B3-8E51-5BC0E739E0CB",
"versionEndExcluding": "2.8.50",
"versionStartIncluding": "2.8.0"
},
{
"criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "CF53486E-FAAC-40B3-82CE-4EDCD2C96690",
"versionEndExcluding": "3.4.26",
"versionStartIncluding": "3.4.0"
},
{
"criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "25A92454-6E0B-4BDE-8967-BB3E32125102",
"versionEndExcluding": "4.1.12",
"versionStartIncluding": "4.1.0"
},
{
"criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "53E58B92-6D5D-4949-B75F-687F52961FDA",
"versionEndExcluding": "4.2.7",
"versionStartIncluding": "4.2.0"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9106BF81-B898-4EB0-B63C-9919D3B22260",
"versionEndExcluding": "8.5.15",
"versionStartIncluding": "8.5.0"
},
{
"criteria": "cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9B37281E-9B44-42A5-AE0A-17CE6770995C",
"versionEndExcluding": "8.6.15",
"versionStartIncluding": "8.6.0"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "cve@mitre.org"
}