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CVE-2021-20440

Estado: ModificadaMedia (4.3)—

IBM API Connect 10.0.0.0, and 2018.4.1.0 through 2018.4.1.13 does not restrict member registration to the intended recepient. An attacker who is a valid user in the user registry used by API Manager can use a stolen invitation link and register themselves as a member of an API provider organization. IBM X-Force ID: 196536.

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)

IBM — API Connect

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-20440",
  "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:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Secondary",
        "source": "psirt@us.ibm.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 6.4,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "LOW",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 4.7,
        "exploitabilityScore": 1.6
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "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:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "psirt@us.ibm.com",
      "affectedData": [
        {
          "vendor": "IBM",
          "product": "API Connect",
          "versions": [
            {
              "status": "affected",
              "version": "2018.4.1.0"
            },
            {
              "status": "affected",
              "version": "2018.4.1.13"
            },
            {
              "status": "affected",
              "version": "10.0.0.0"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-03-15T16:15:13.217",
  "references": [
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/196536",
      "tags": [
        "VDB Entry",
        "Vendor Advisory"
      ],
      "source": "psirt@us.ibm.com"
    },
    {
      "url": "https://www.ibm.com/support/pages/node/6430107",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "psirt@us.ibm.com"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/196536",
      "tags": [
        "VDB Entry",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.ibm.com/support/pages/node/6430107",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "IBM API Connect 10.0.0.0, and 2018.4.1.0 through 2018.4.1.13 does not restrict member registration to the intended recepient. An attacker who is a valid user in the user registry used by API Manager can use a stolen invitation link and register themselves as a member of an API provider organization. IBM X-Force ID: 196536."
    },
    {
      "lang": "es",
      "value": "IBM API Connect versiones 10.0.0.0 y 2018.4.1.0 hasta 2018.4.1.13, no restringe el registro de miembros al destinatario previsto. Un atacante que sea un usuario válido en el registro de usuarios usado por API Manager puede usar un enlace de invitación robado y registrarse como miembro de una organización proveedora de API. IBM X-Force ID: 196536"
    }
  ],
  "lastModified": "2026-06-17T03:33:51.450",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:ibm:api_connect:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "403B95C9-40E9-4F9D-AE7D-5B3BC2ECE8A5",
              "versionEndIncluding": "2018.4.1.13",
              "versionStartIncluding": "2018.4.1.0"
            },
            {
              "criteria": "cpe:2.3:a:ibm:api_connect:10.0.0.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "AF48BB29-806D-4613-A1D8-77462461245E"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "psirt@us.ibm.com"
}