CVE-2026-34247

{
  "id": "CVE-2026-34247",
  "sourceIdentifier": "[email protected]",
  "published": "2026-03-27T17:16:30.213",
  "lastModified": "2026-10-26T21:10:00.170",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "WWBN AVideo is an open source video platform. In versions up to and including 26.0, the `plugin/Live/uploadPoster.php` endpoint allows any authenticated user to overwrite the poster image for any scheduled live stream by supplying an arbitrary `live_schedule_id`. The endpoint only checks `User::isLogged()` but never verifies that the authenticated user owns the targeted schedule. After overwriting the poster, the endpoint broadcasts a `socketLiveOFFCallback` notification containing the victim's broadcast key and user ID to all connected WebSocket clients. Commit 5fcb3bdf59f26d65e203cfbc8a685356ba300b60 fixes the issue."
    },
    {
      "lang": "es",
      "value": "WWBN AVideo es una plataforma de vídeo de código abierto. En versiones hasta la 26.0 inclusive, el endpoint ’plugin/Live/uploadPoster.PHP’ permite a cualquier usuario autenticado sobrescribir la imagen de póster para cualquier transmisión en vivo programada al proporcionar un ’live_schedule_id’ arbitrario. El endpoint solo verifica ’User::isLogged()’ pero nunca verifica que el usuario autenticado sea propietario de la programación objetivo. Después de sobrescribir el póster, el endpoint difunde una notificación ’socketLiveOFFCallback’ que contiene la clave de transmisión y el ID de usuario de la víctima a todos los clientes WebSocket conectados. El commit 5fcb3bdf59f26d65e203cfbc8a685356ba300b60 corrige el problema."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "WWBN",
          "product": "AVideo",
          "versions": [
            {
              "version": "<= 26.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.5
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-03-27T17:29:06.093501Z",
          "id": "CVE-2026-34247",
          "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-862"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:wwbn:avideo:*:*:*:*:*:*:*:*",
              "versionEndIncluding": "26.0",
              "matchCriteriaId": "774C24F1-9D26-484F-B931-1DA107C8F588"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/WWBN/AVideo/commit/5fcb3bdf59f26d65e203cfbc8a685356ba300b60",
      "source": "[email protected]",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-g3hj-mf85-679g",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ]
    }
  ]
}