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CVE-2026-42562

Estado: AplazadaAlta (8.3)—

Plainpad is a self hosted note taking app. Prior to version 1.1.1, Plainpad allows a low-privilege authenticated user to self-escalate to administrator by submitting admin=true in PUT /api.php/v1/users/{id}. The endpoint directly persists the admin attribute from user input, and the escalated account can immediately access admin-only routes. This issue has been patched in version 1.1.1.

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.

Vulnerabilidad de escalada de privilegios en API remota autenticada (AV:N, PR:L): usuario con bajos privilegios explota endpoint PUT para auto-escalarse a administrador modificando parámetro admin=true.

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

Threat Intelligence ProgramApplication Isolation and SandboxingExploit ProtectionUpdate SoftwareVulnerability ScanningPrivileged Account Management

Tecnologías afectadas (1)

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

Plainpad — PlainpadAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-42562",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-42562",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-11T14:50:09.302375Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.3,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.5,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "alextselegidis",
          "product": "plainpad",
          "versions": [
            {
              "status": "affected",
              "version": "< 1.1.1"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-05-09T20:16:28.933",
  "references": [
    {
      "url": "https://github.com/alextselegidis/plainpad/commit/9216a876d27b22c3d9259551636d803f7cb075fc",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/alextselegidis/plainpad/issues/138",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/alextselegidis/plainpad/releases/tag/1.1.1",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/alextselegidis/plainpad/security/advisories/GHSA-pvfv-wvpm-q6f6",
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-269"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Plainpad is a self hosted note taking app. Prior to version 1.1.1, Plainpad allows a low-privilege authenticated user to self-escalate to administrator by submitting admin=true in PUT /api.php/v1/users/{id}. The endpoint directly persists the admin attribute from user input, and the escalated account can immediately access admin-only routes. This issue has been patched in version 1.1.1."
    },
    {
      "lang": "es",
      "value": "Plainpad es una aplicación autoalojada para tomar notas. Antes de la versión 1.1.1, Plainpad permite a un usuario autenticado con bajos privilegios autoescalar a administrador al enviar admin=true en PUT /API.PHP/v1/users/{id}. El endpoint persiste directamente el atributo admin de la entrada del usuario, y la cuenta escalada puede acceder inmediatamente a rutas solo para administradores. Este problema ha sido parcheado en la versión 1.1.1."
    }
  ],
  "lastModified": "2026-07-24T21:10:00.143",
  "sourceIdentifier": "security-advisories@github.com"
}