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CVE-2024-38518

Estado: AplazadaMedia (4.6)—

BigBlueButton is an open-source virtual classroom designed to help teachers teach and learners learn. An attacker with a valid join link to a meeting can trick BigBlueButton into generating a signed join link with additional parameters. One of those parameters may be "role=moderator", allowing an attacker to join a meeting as moderator using a join link that was originally created for viewer access. This vulnerability has been patched in version(s) 2.6.18, 2.7.8 and 3.0.0-alpha.7.

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)

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

Bigbluebutton — BigbluebuttonAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2024-38518",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-38518",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-07-02T19:57:25.410885Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 4.6,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.5,
        "exploitabilityScore": 2.1
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "bigbluebutton",
          "product": "bigbluebutton",
          "versions": [
            {
              "status": "affected",
              "version": "< 2.6.18"
            },
            {
              "status": "affected",
              "version": ">= 2.7.0, < 2.7.8"
            },
            {
              "status": "affected",
              "version": ">= 2.8.0, < 3.0.0-alpha.7"
            }
          ]
        }
      ]
    }
  ],
  "published": "2024-06-28T21:15:03.180",
  "references": [
    {
      "url": "https://github.com/bigbluebutton/bigbluebutton/commit/a9d436accdcd26ea66bed9f391488ac128cd62d1",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/bigbluebutton/bigbluebutton/commit/ea6e9461dceae8fa593543d8c686f77bb8677e72",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/bigbluebutton/bigbluebutton/pull/20279",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-4m48-49h7-f3c4",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/bigbluebutton/bigbluebutton/commit/a9d436accdcd26ea66bed9f391488ac128cd62d1",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/bigbluebutton/bigbluebutton/commit/ea6e9461dceae8fa593543d8c686f77bb8677e72",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/bigbluebutton/bigbluebutton/pull/20279",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-4m48-49h7-f3c4",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "BigBlueButton is an open-source virtual classroom designed to help teachers teach and learners learn. An attacker with a valid join link to a meeting can trick BigBlueButton into generating a signed join link with additional parameters. One of those parameters may be \"role=moderator\", allowing an attacker to join a meeting as moderator using a join link that was originally created for viewer access. This vulnerability has been patched in version(s) 2.6.18, 2.7.8 and 3.0.0-alpha.7."
    },
    {
      "lang": "es",
      "value": "BigBlueButton es un aula virtual de código abierto diseñada para ayudar a los profesores a enseñar y a los alumnos a aprender. Un atacante con un enlace de entrada válido para una reunión puede engañar a BigBlueButton para que genere un enlace de entrada firmado con parámetros adicionales. Uno de esos parámetros puede ser \"rol=moderador\", lo que permite a un atacante unirse a una reunión como moderador utilizando un enlace para unirse que se creó originalmente para el acceso de los espectadores. Esta vulnerabilidad ha sido parcheada en las versiones 2.6.18, 2.7.8 y 3.0.0-alpha.7."
    }
  ],
  "lastModified": "2026-06-17T07:40:27.477",
  "sourceIdentifier": "security-advisories@github.com"
}