CVE-2026-71555

{
  "id": "CVE-2026-71555",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-06T22:18:32.553",
  "lastModified": "2026-10-24T15:10:00.190",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "PILOS (Platform for Interactive Live-Online Seminars) is a frontend for BigBlueButton. From 2.1.0 until 4.14.1, PILOS does not send a Cross-Origin-Opener-Policy response header, so pages opened by PILOS via a link that opens a new browsing context (e.g., target=\"_blank\") retain a window.opener reference back to the originating PILOS tab. A malicious destination page reached this way can use window.opener to navigate or manipulate the original PILOS tab, a technique known as reverse tabnabbing, potentially redirecting an authenticated user to a phishing page that mimics PILOS. This issue is fixed in version 4.14.1."
    },
    {
      "lang": "es",
      "value": "PILOS (Plataforma para Seminarios Interactivos en Vivo y en Línea) es un frontend para BigBlueButton. Desde la versión 2.1.0 hasta la 4.14.1, PILOS no envía una cabecera de respuesta Cross-Origin-Opener-Policy, por lo que las páginas abiertas por PILOS a través de un enlace que abre un nuevo contexto de navegación (por ejemplo, target=’_blank’) retienen una referencia window.opener de vuelta a la pestaña PILOS de origen. Una página de destino maliciosa alcanzada de esta manera puede usar window.opener para navegar o manipular la pestaña PILOS original, una técnica conocida como reverse tabnabbing, redirigiendo potencialmente a un usuario autenticado a una página de phishing que imita a PILOS. Este problema está solucionado en la versión 4.14.1."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "THM-Health",
          "product": "PILOS",
          "versions": [
            {
              "version": ">= 2.1.0, < 4.14.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N",
          "baseScore": 4.1,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-07T17:25:46.465635Z",
          "id": "CVE-2026-71555",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1022"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/THM-Health/PILOS/commit/b50f2bd07c4f4a7d6a9981578238ae3579275d81",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/THM-Health/PILOS/releases/tag/v4.14.1",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/THM-Health/PILOS/security/advisories/GHSA-j4wr-p8gh-xrw5",
      "source": "[email protected]"
    }
  ]
}