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CVE-2021-42336

Estado: ModificadaMedia (4.3)—

The learning history page of the Easytest is vulnerable by permission bypass. After obtaining a user’s permission, remote attackers can access other users’ and administrator’s account information except password by crafting URL parameters.

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)

Huaju — Easytest Online Learning Test Platform

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-42336",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:N/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "twcert@cert.org.tw",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 4.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "twcert@cert.org.tw",
      "affectedData": [
        {
          "vendor": "Huachu Digital Technology Co.,Ltd.",
          "product": "Easytest",
          "versions": [
            {
              "status": "affected",
              "version": "1705"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-10-15T12:15:08.010",
  "references": [
    {
      "url": "https://www.twcert.org.tw/tw/cp-132-5205-1de5a-1.html",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "twcert@cert.org.tw"
    },
    {
      "url": "https://www.twcert.org.tw/tw/cp-132-5205-1de5a-1.html",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "twcert@cert.org.tw",
      "description": [
        {
          "lang": "en",
          "value": "CWE-285"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The learning history page of the Easytest is vulnerable by permission bypass. After obtaining a user’s permission, remote attackers can access other users’ and administrator’s account information except password by crafting URL parameters."
    },
    {
      "lang": "es",
      "value": "La página del historial de aprendizaje de Easytest es vulnerable por una omisión de permisos. Después de obtener permisos de usuario, unos atacantes remotos pueden acceder a la información de la cuenta de otros usuarios y del administrador, excepto la contraseña, al diseñar parámetros de la URL"
    }
  ],
  "lastModified": "2026-06-17T04:09:40.137",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:huaju:easytest_online_learning_test_platform:1705:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "63605331-63BE-4B6B-9E62-43179A48FAAB"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "twcert@cert.org.tw"
}