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CVE-2021-29454

Estado: ModificadaAlta (8.8)—

Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. Prior to versions 3.1.42 and 4.0.2, template authors could run arbitrary PHP code by crafting a malicious math string. If a math string was passed through as user provided data to the math function, external users could run arbitrary PHP code by crafting a malicious math string. Users should upgrade to version 3.1.42 or 4.0.2 to receive a patch.

CVSS

Probabilidad de explotación (EPSS)

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 (3)

Debian — Debian LinuxFedoraproject — FedoraSmarty — Smarty

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-29454",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2021-29454",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-04-23T15:57:13.410401Z"
        }
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          "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
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          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
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          "integrityImpact": "HIGH",
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          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
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        "exploitabilityScore": 2.8
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  "published": "2022-01-10T20:15:08.000",
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-74"
        }
      ]
    },
    {
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      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-74"
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    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. Prior to versions 3.1.42 and 4.0.2, template authors could run arbitrary PHP code by crafting a malicious math string. If a math string was passed through as user provided data to the math function, external users could run arbitrary PHP code by crafting a malicious math string. Users should upgrade to version 3.1.42 or 4.0.2 to receive a patch."
    },
    {
      "lang": "es",
      "value": "Smarty es un motor de plantillas para PHP que facilita la separación de la presentación (HTML/CSS) de la lógica de la aplicación. Antes de las versiones 3.1.42 y 4.0.2, los autores de plantillas podían ejecutar código PHP arbitrario al diseñar una cadena matemática maliciosa. Si era pasada una cadena matemática como datos proporcionados por el usuario a la función matemática, los usuarios externos podían ejecutar código PHP arbitrario al diseñar una cadena matemática maliciosa. Los usuarios deben actualizar a la versión 3.1.42 o 4.0.2 para recibir un parche"
    }
  ],
  "lastModified": "2026-06-17T03:47:40.450",
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