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CVE-2023-25821

Estado: ModificadaAlta (7.5)—

Nextcloud is an Open Source private cloud software. Versions 24.0.4 and above, prior to 24.0.7, and 25.0.0 and above, prior to 25.0.1, contain Improper Access Control. Secure view for internal shares can be circumvented if reshare permissions are also given. This issue is patched in versions 24.0.7 and 25.0.1. No workaround is available.

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 (1)

Nextcloud — Nextcloud Server

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2023-25821",
  "cveTags": [],
  "metrics": {
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          "id": "CVE-2023-25821",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-03-10T20:59:57.296446Z"
        }
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.1
      },
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          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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  "published": "2023-02-25T00:15:11.093",
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          "value": "CWE-284"
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      "type": "Primary",
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      "description": [
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          "lang": "en",
          "value": "NVD-CWE-Other"
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  "descriptions": [
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      "lang": "en",
      "value": "Nextcloud is an Open Source private cloud software. Versions 24.0.4 and above, prior to 24.0.7, and 25.0.0 and above, prior to 25.0.1, contain Improper Access Control. Secure view for internal shares can be circumvented if reshare permissions are also given. This issue is patched in versions 24.0.7 and 25.0.1. No workaround  is available."
    },
    {
      "lang": "es",
      "value": "Nextcloud es un software de nube privada de código abierto. Las versiones 24.0.4 y posteriores, anteriores a la 24.0.7, y 25.0.0 y posteriores, anteriores a la 25.0.1, contienen control de acceso inadecuado. La vista segura de recursos compartidos internos se puede eludir si también se otorgan permisos para compartir. Este problema se solucionó en las versiones 24.0.7 y 25.0.1. No hay wordkarounds."
    }
  ],
  "lastModified": "2026-06-17T05:42:03.577",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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