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CVE-2021-29047

Estado: ModificadaAlta (7.5)—

The SimpleCaptcha implementation in Liferay Portal 7.3.4, 7.3.5 and Liferay DXP 7.3 before fix pack 1 does not invalidate CAPTCHA answers after it is used, which allows remote attackers to repeatedly perform actions protected by a CAPTCHA challenge by reusing the same CAPTCHA answer.

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 (2)

Liferay — DXPLiferay — Liferay Portal

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-29047",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-05-16T16:15:07.297",
  "references": [
    {
      "url": "https://portal.liferay.dev/learn/security/known-vulnerabilities/-/asset_publisher/HbL5mxmVrnXW/content/id/120743467",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://portal.liferay.dev/learn/security/known-vulnerabilities/-/asset_publisher/HbL5mxmVrnXW/content/id/120743467",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The SimpleCaptcha implementation in Liferay Portal 7.3.4, 7.3.5 and Liferay DXP 7.3 before fix pack 1 does not invalidate CAPTCHA answers after it is used, which allows remote attackers to repeatedly perform actions protected by a CAPTCHA challenge by reusing the same CAPTCHA answer."
    },
    {
      "lang": "es",
      "value": "La implementación de SimpleCaptcha en Liferay Portal versiones 7.3.4, 7.3.5 y Liferay DXP versiones 7.3 anteriores al fixpack 1, no invalida las respuestas CAPTCHA después de su uso, lo que permite a atacantes remotos llevar a cabo repetidamente acciones protegidas por un desafío CAPTCHA reutilizando la misma respuesta CAPTCHA"
    }
  ],
  "lastModified": "2026-07-09T01:16:51.907",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:liferay:dxp:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5C0B6536-11D4-48A1-8EC8-FCDFFFD07540",
              "versionEndExcluding": "7.3"
            },
            {
              "criteria": "cpe:2.3:a:liferay:dxp:7.3:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "21C55D41-DB66-494D-BEEB-BDAC7CB4B31B"
            },
            {
              "criteria": "cpe:2.3:a:liferay:liferay_portal:7.3.4:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2C673509-5436-44DF-AFCE-BE5C3188D62F"
            },
            {
              "criteria": "cpe:2.3:a:liferay:liferay_portal:7.3.5:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2B842A08-1EDB-4232-89C9-9B966E251B3B"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}