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CVE-2026-34384

Estado: AnalizadaAlta (7.3)—

Admidio is an open-source user management solution. Prior to version 5.0.8, the create_user, assign_member, and assign_user action modes in modules/registration.php approve pending user registrations via GET request without validating a CSRF token. Unlike the delete_user mode in the same file (which correctly validates the token), these three approval actions read their parameters from $_GET and perform irreversible state changes without any protection.

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An attacker who has submitted a pending registration can extract their own user UUID from the registration confirmation email URL, then trick any user with the rol_approve_users right into visiting a crafted URL that automatically approves the registration. This bypasses the manual registration approval workflow entirely. This issue has been patched in version 5.0.8.

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).

🎯 Técnicas ATT&CK

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

Inferido por reglas deterministas a partir del vector CVSS y la CWE. Solo orientativo.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

User TrainingUser Account ManagementApplication Isolation and SandboxingExploit ProtectionUpdate Software

Tecnologías afectadas (1)

Admidio — Admidio

CWE

Referencias

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{
  "id": "CVE-2026-34384",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "id": "CVE-2026-34384",
          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "poc"
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            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-04-01T15:48:30.626509Z"
        }
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          "version": "3.1",
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          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "NONE"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
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          "value": "CWE-352"
        }
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  ],
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    {
      "lang": "en",
      "value": "Admidio is an open-source user management solution. Prior to version 5.0.8, the create_user, assign_member, and assign_user action modes in modules/registration.php approve pending user registrations via GET request without validating a CSRF token. Unlike the delete_user mode in the same file (which correctly validates the token), these three approval actions read their parameters from $_GET and perform irreversible state changes without any protection. An attacker who has submitted a pending registration can extract their own user UUID from the registration confirmation email URL, then trick any user with the rol_approve_users right into visiting a crafted URL that automatically approves the registration. This bypasses the manual registration approval workflow entirely. This issue has been patched in version 5.0.8."
    },
    {
      "lang": "es",
      "value": "Admidio es una solución de gestión de usuarios de código abierto. Antes de la versión 5.0.8, los modos de acción create_user, assign_member y assign_user en modules/registration.php aprueban registros de usuario pendientes a través de una solicitud GET sin validar un token CSRF. A diferencia del modo delete_user en el mismo archivo (que valida correctamente el token), estas tres acciones de aprobación leen sus parámetros de $_GET y realizan cambios de estado irreversibles sin ninguna protección. Un atacante que ha enviado un registro pendiente puede extraer su propio UUID de usuario de la URL del correo electrónico de confirmación de registro, luego engañar a cualquier usuario con el derecho rol_approve_users para que visite una URL manipulada que aprueba automáticamente el registro. Esto elude completamente el flujo de trabajo de aprobación manual de registros. Este problema ha sido parcheado en la versión 5.0.8."
    }
  ],
  "lastModified": "2026-10-06T22:10:00.247",
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}