CVE-2025-24293

Estado: AplazadaCrítica (9.2)—

# Active Storage allowed transformation methods potentially unsafe

Active Storage attempts to prevent the use of potentially unsafe image transformation methods and parameters by default.

The default allowed list contains three methods allow for the circumvention of the safe defaults which enables potential command injection vulnerabilities in cases where arbitrary user supplied input is accepted as valid transformation methods or parameters.

Impact ------ This vulnerability impacts applications that use Active Storage with the image_processing processing gem in addition to mini_magick as the image processor.

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Vulnerable code will look something similar to this: ``` <%= image_tag blob.variant(params[:t] => params[:v]) %> ```

Where the transformation method or its arguments are untrusted arbitrary input.

All users running an affected release should either upgrade or use one of the workarounds immediately.

Workarounds ----------- Consuming user supplied input for image transformation methods or their parameters is unsupported behavior and should be considered dangerous.

Strict validation of user supplied methods and parameters should be performed as well as having a strong [ImageMagick security policy](https://imagemagick.org/script/security-policy.php) deployed.

Credits -------

Thank you [lio346](https://hackerone.com/lio346) for reporting this!

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Puntuación base: 9.2

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 5.47%
Percentil entre todas las CVEs puntuadas: 93
Fecha de la puntuación: 5/10/2026

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access92 %
Impacto principalT1059 Command and Scripting Interpreterexecution88 %
Impacto secundarioT1068 Exploitation for Privilege Escalationprivilege escalation72 %

AV:N, PR:N, UI:N indica red sin privilegios. CWE-94 (code injection) y descripción explícita de command injection vulnerability mediante input arbitrario en parámetros de transformación de imágenes. T1059 confirmado por injection en métodos de ImageMagick que ejecutan comandos del sistema.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account Management Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software Vulnerability Scanning

Tecnologías afectadas (3)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Imagemagick — Mini Magick^AI Ruby-vips — Image Processing^AI Rubyonrails — Active Storage^AI

CWE

CWE-77, CWE-94
CWE-88

Referencias

JSON original (NVD)

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  "descriptions": [
    {
      "lang": "en",
      "value": "# Active Storage allowed transformation methods potentially unsafe\r\n\r\nActive Storage attempts to prevent the use of potentially unsafe image\r\ntransformation methods and parameters by default.\r\n\r\nThe default allowed list contains three methods allow for the circumvention\r\nof the safe defaults which enables potential command injection\r\nvulnerabilities in cases where arbitrary user supplied input is accepted as\r\nvalid transformation methods or parameters.\r\n\r\n\r\nImpact\r\n------\r\nThis vulnerability impacts applications that use Active Storage with the image_processing processing gem in addition to mini_magick as the image processor.\r\n\r\nVulnerable code will look something similar to this:\r\n```\r\n<%= image_tag blob.variant(params[:t] => params[:v]) %>\r\n```\r\n\r\nWhere the transformation method or its arguments are untrusted arbitrary input.\r\n\r\nAll users running an affected release should either upgrade or use one of the workarounds immediately.\r\n\r\n\r\n\r\nWorkarounds\r\n-----------\r\nConsuming user supplied input for image transformation methods or their parameters is unsupported behavior and should be considered dangerous.\r\n\r\nStrict validation of user supplied methods and parameters should be performed\r\nas well as having a strong [ImageMagick security\r\npolicy](https://imagemagick.org/script/security-policy.php) deployed.\r\n\r\nCredits\r\n-------\r\n\r\nThank you [lio346](https://hackerone.com/lio346) for reporting this!"
    },
    {
      "lang": "es",
      "value": "# Métodos de transformación permitidos de Active Storage potencialmente inseguros\n\nActive Storage intenta prevenir el uso de métodos y parámetros de transformación de imagen potencialmente inseguros por defecto.\n\nLa lista de permitidos por defecto contiene tres métodos que permiten la elusión de los valores seguros por defecto, lo que habilita potenciales vulnerabilidades de inyección de comandos en casos donde la entrada arbitraria suministrada por el usuario es aceptada como métodos o parámetros de transformación válidos.\n\nImpacto\n------\nEsta vulnerabilidad impacta a las aplicaciones que usan Active Storage con la gema de procesamiento image_processing además de mini_magick como procesador de imágenes.\n\nEl código vulnerable se verá similar a esto:\n```\n&lt;%= image_tag blob.variant(params[:t] =&gt; params[:v]) %&gt;\n```\n\nDonde el método de transformación o sus argumentos son entrada arbitraria no confiable.\n\nTodos los usuarios que ejecutan una versión afectada deberían actualizar o usar una de las soluciones alternativas inmediatamente.\n\nSoluciones alternativas\n-----------\nEl consumo de la entrada suministrada por el usuario para métodos de transformación de imagen o sus parámetros es un comportamiento no soportado y debería considerarse peligroso.\n\nSe debería realizar una validación estricta de los métodos y parámetros suministrados por el usuario, así como tener una [política de seguridad de ImageMagick](https://imagemagick.org/script/security-policy.php) robusta desplegada.\n\nCréditos\n-------\n\n¡Gracias a [lio346](https://hackerone.com/lio346) por reportar esto!"
    }
  ],
  "lastModified": "2026-07-15T02:17:23.020",
  "sourceIdentifier": "support@hackerone.com"
}