fkie_cve-2025-20215
Vulnerability from fkie_nvd
Published
2025-08-06 17:15
Modified
2025-08-06 20:23
Severity ?
5.4 (Medium) - CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N
Summary
A vulnerability in the meeting-join functionality of Cisco Webex Meetings could have allowed an unauthenticated, network-proximate attacker to complete a meeting-join process in place of an intended targeted user, provided the requisite conditions were satisfied. Cisco has addressed this vulnerability in the Cisco Webex Meetings service, and no customer action is needed. This vulnerability existed due to client certificate validation issues. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by monitoring local wireless or adjacent networks for client-join requests and attempting to interrupt and complete the meeting-join flow as another user who was currently joining a meeting. To successfully exploit the vulnerability, an attacker would need the capability to position themselves in a local wireless or adjacent network, to monitor and intercept the targeted network traffic flows, and to satisfy timing requirements in order to interrupt the meeting-join flow and exploit the vulnerability. A successful exploit could have allowed the attacker to join the meeting as another user. However, the Cisco Product Security Incident Response Team (PSIRT) is not aware of any malicious use of the vulnerability that is described in this advisory.
References
psirt@cisco.comhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-join-yNXfqHk4
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in the meeting-join functionality of Cisco Webex Meetings could have allowed an unauthenticated, network-proximate attacker to complete a meeting-join process in place of an intended targeted user, provided the requisite conditions were satisfied. Cisco has addressed this vulnerability in the Cisco Webex Meetings service, and no customer action is needed.\r\n\r\nThis vulnerability existed due to client certificate validation issues. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by monitoring local wireless or adjacent networks for client-join requests and attempting to interrupt and complete the meeting-join flow as another user who was currently joining a meeting. To successfully exploit the vulnerability, an attacker would need the capability to position themselves in a local wireless or adjacent network, to monitor and intercept the targeted network traffic flows, and to satisfy timing requirements in order to interrupt the meeting-join flow and exploit the vulnerability. A successful exploit could have allowed the attacker to join the meeting as another user. However, the Cisco Product Security Incident Response Team (PSIRT) is not aware of any malicious use of the vulnerability that is described in this advisory."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en la funci\u00f3n \"meeting-join\" de Cisco Webex Meetings podr\u00eda haber permitido que un atacante no autenticado, cercano a la red, completara el \"meeting-join\"  en lugar del usuario objetivo, siempre que se cumplieran las condiciones requeridas. Cisco ha solucionado esta vulnerabilidad en el servicio Cisco Webex Meetings y no se requiere ninguna acci\u00f3n por parte del cliente. Esta vulnerabilidad exist\u00eda debido a problemas de validaci\u00f3n del certificado del cliente. Antes de que se solucionara, un atacante podr\u00eda haberla explotado monitorizando redes inal\u00e1mbricas locales o adyacentes en busca de solicitudes de uni\u00f3n de clientes e intentando interrumpir y completar el flujo de entrada a la reuni\u00f3n como otro usuario que se estaba uniendo a una reuni\u00f3n. Para explotar la vulnerabilidad con \u00e9xito, un atacante necesitar\u00eda la capacidad de posicionarse en una red inal\u00e1mbrica local o adyacente, monitorizar e interceptar los flujos de tr\u00e1fico de la red objetivo y cumplir con los requisitos de tiempo para interrumpir el flujo de entrada a la reuni\u00f3n y explotar la vulnerabilidad. Una explotaci\u00f3n exitosa podr\u00eda haber permitido al atacante unirse a la reuni\u00f3n como otro usuario. Sin embargo, el Equipo de Respuesta a Incidentes de Seguridad de Productos de Cisco (PSIRT) no tiene conocimiento de ning\u00fan uso malicioso de la vulnerabilidad descrita en este aviso."
    }
  ],
  "id": "CVE-2025-20215",
  "lastModified": "2025-08-06T20:23:37.600",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 4.2,
        "source": "psirt@cisco.com",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-08-06T17:15:37.033",
  "references": [
    {
      "source": "psirt@cisco.com",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-join-yNXfqHk4"
    }
  ],
  "sourceIdentifier": "psirt@cisco.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-295"
        }
      ],
      "source": "psirt@cisco.com",
      "type": "Primary"
    }
  ]
}


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