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CVE-2021-24943

Estado: ModificadaCrítica (9.8)—

The Registrations for the Events Calendar WordPress plugin before 2.7.6 does not sanitise and escape the event_id in the rtec_send_unregister_link AJAX action (available to both unauthenticated and authenticated users) before using it in a SQL statement, leading to an unauthenticated SQL injection.

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)

Roundupwp — Registrations FOR THE Events Calendar

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-24943",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "contact@wpscan.com",
      "affectedData": [
        {
          "vendor": "Unknown",
          "product": "Registrations for the Events Calendar – Event Registration Plugin",
          "versions": [
            {
              "status": "affected",
              "version": "2.7.6",
              "lessThan": "2.7.6",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-12-06T16:15:08.613",
  "references": [
    {
      "url": "https://wpscan.com/vulnerability/ba50c590-42ee-4523-8aa0-87ac644b77ed",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "contact@wpscan.com"
    },
    {
      "url": "https://wpscan.com/vulnerability/ba50c590-42ee-4523-8aa0-87ac644b77ed",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "contact@wpscan.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-89"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Registrations for the Events Calendar WordPress plugin before 2.7.6 does not sanitise and escape the event_id in the rtec_send_unregister_link AJAX action (available to both unauthenticated and authenticated users) before using it in a SQL statement, leading to an unauthenticated SQL injection."
    },
    {
      "lang": "es",
      "value": "El plugin Registrations for the Events Calendar de WordPress versiones anteriores a 2.7.6, no sanea ni escapa del parámetro event_id en la acción AJAX rtec_send_unregister_link (disponible tanto para usuarios no autenticados como autenticados) antes de usarlo en una sentencia SQL, conllevando a una inyección SQL no autenticada"
    }
  ],
  "lastModified": "2026-06-17T03:41:10.393",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:roundupwp:registrations_for_the_events_calendar:*:*:*:*:*:wordpress:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BBE8EDC9-E706-434B-B2AD-FF81C35FC8F0",
              "versionEndExcluding": "2.7.6"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "contact@wpscan.com"
}