CVE-2021-44657
Estado: ModificadaAlta (8.8)—
In StackStorm versions prior to 3.6.0, the jinja interpreter was not run in sandbox mode and thus allows execution of unsafe system commands. Jinja does not enable sandboxed mode by default due to backwards compatibility. Stackstorm now sets sandboxed mode for jinja by default.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 8.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 2.47%
- Percentil entre todas las CVEs puntuadas: 84
- Fecha de la puntuación: 6/10/2026
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).
Tecnologías afectadas (1)
CWE
- NVD-CWE-Other
Referencias
- https://github.com/StackStorm/st2/pull/5359
- https://github.com/pallets/jinja/issues/549
- https://podalirius.net/en/articles/python-vulnerabilities-code-execution-in-jinja-templates/
- https://stackstorm.com/2021/12/16/stackstorm-v3-6-0-released/
- https://github.com/StackStorm/st2/pull/5359
- https://github.com/pallets/jinja/issues/549
- https://podalirius.net/en/articles/python-vulnerabilities-code-execution-in-jinja-templates/
- https://stackstorm.com/2021/12/16/stackstorm-v3-6-0-released/
JSON original (NVD)
Mostrar
{
"id": "CVE-2021-44657",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 9,
"accessVector": "NETWORK",
"vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C",
"authentication": "SINGLE",
"integrityImpact": "COMPLETE",
"accessComplexity": "LOW",
"availabilityImpact": "COMPLETE",
"confidentialityImpact": "COMPLETE"
},
"acInsufInfo": false,
"impactScore": 10,
"baseSeverity": "HIGH",
"obtainAllPrivilege": false,
"exploitabilityScore": 8,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 8.8,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 2.8
}
]
},
"affected": [
{
"source": "cve@mitre.org",
"affectedData": [
{
"vendor": "n/a",
"product": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
]
}
],
"published": "2021-12-15T15:15:11.597",
"references": [
{
"url": "https://github.com/StackStorm/st2/pull/5359",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://github.com/pallets/jinja/issues/549",
"tags": [
"Exploit",
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"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://podalirius.net/en/articles/python-vulnerabilities-code-execution-in-jinja-templates/",
"tags": [
"Exploit",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://stackstorm.com/2021/12/16/stackstorm-v3-6-0-released/",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://github.com/StackStorm/st2/pull/5359",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://github.com/pallets/jinja/issues/549",
"tags": [
"Exploit",
"Issue Tracking",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://podalirius.net/en/articles/python-vulnerabilities-code-execution-in-jinja-templates/",
"tags": [
"Exploit",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://stackstorm.com/2021/12/16/stackstorm-v3-6-0-released/",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "NVD-CWE-Other"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In StackStorm versions prior to 3.6.0, the jinja interpreter was not run in sandbox mode and thus allows execution of unsafe system commands. Jinja does not enable sandboxed mode by default due to backwards compatibility. Stackstorm now sets sandboxed mode for jinja by default."
},
{
"lang": "es",
"value": "En StackStorm versiones anteriores a 3.6.0, el intérprete de jinja no se ejecutaba en modo sandbox y, por tanto, permitía una ejecución de comandos del sistema no seguros. Jinja no habilita el modo sandbox por defecto debido a la compatibilidad con versiones anteriores. Stackstorm ahora establece el modo sandboxed para jinja por defecto"
}
],
"lastModified": "2026-06-17T04:12:39.087",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:stackstorm:stackstorm:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "08FCA67B-B55C-40B4-BE00-5B7DCA3E61E5",
"versionEndExcluding": "3.6.0"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "cve@mitre.org"
}