CVE-2026-43878

{
  "id": "CVE-2026-43878",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-11T22:22:12.257",
  "lastModified": "2026-10-26T18:10:00.173",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "WWBN AVideo is an open source video platform. In versions up to and including 29.0, plugin/Meet/iframe.php echoes the attacker-controlled user and pass query parameters unescaped into a JavaScript double-quoted string literal inside a <script> block. An attacker who sends a victim to a crafted URL can break out of the string and execute arbitrary JavaScript in the victim's browser in the context of the AVideo origin. No authentication is required if a public Meet schedule exists on the target. Commit 3298ced2bcf92e4f3acff6ce9bde14edf42ecb5b contains an updated fix."
    },
    {
      "lang": "es",
      "value": "WWBN AVideo es una plataforma de video de código abierto. En versiones hasta la 29.0 inclusive, plugin/Meet/iframe.php imprime los parámetros de consulta user y pass controlados por el atacante sin escapar en un literal de cadena de JavaScript entre comillas dobles dentro de un bloque [script_tag]. Un atacante que envía a una víctima a una URL manipulada puede salir de la cadena y ejecutar JavaScript arbitrario en el navegador de la víctima en el contexto del origen de AVideo. No se requiere autenticación si existe un calendario de Meet público en el objetivo. El commit 3298ced2bcf92e4f3acff6ce9bde14edf42ecb5b contiene una corrección actualizada."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "WWBN",
          "product": "AVideo",
          "versions": [
            {
              "version": "<= 29.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.7
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-12T13:22:49.704247Z",
          "id": "CVE-2026-43878",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/WWBN/AVideo/commit/3298ced2bcf92e4f3acff6ce9bde14edf42ecb5b",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-mm5f-8q57-4fc4",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-mm5f-8q57-4fc4",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}