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CVE-2026-33039

Estado: AnalizadaAlta (8.6)—

WWBN AVideo is an open source video platform. In versions 25.0 and below, the plugin/LiveLinks/proxy.php endpoint validates user-supplied URLs against internal/private networks using isSSRFSafeURL(), but only checks the initial URL. When the initial URL responds with an HTTP redirect (Location header), the redirect target is fetched via fakeBrowser() without re-validation, allowing an attacker to reach internal services (cloud metadata, RFC1918 addresses) through an attacker-controlled redirect. This issue is fixed in version 26.0.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:N/PR:N sin interacción permite T1190. SSRF no validado en redirecciones permite proxy interno (T1090) y lectura de metadatos/servicios internos (T1005).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningSSL/TLS InspectionPrivileged Account ManagementNetwork SegmentationNetwork Intrusion Prevention

Tecnologías afectadas (1)

Wwbn — Avideo

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-33039",
  "cveTags": [],
  "metrics": {
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          "id": "CVE-2026-33039",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-03-20T13:52:19.236660Z"
        }
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        "source": "security-advisories@github.com",
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          "version": "3.1",
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          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
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        "exploitabilityScore": 3.9
      }
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      "source": "security-advisories@github.com",
      "affectedData": [
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            {
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              "version": "< 26.0"
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  "published": "2026-03-20T06:16:12.150",
  "references": [
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      "description": [
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          "value": "CWE-918"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "WWBN AVideo is an open source video platform. In versions 25.0 and below, the plugin/LiveLinks/proxy.php endpoint validates user-supplied URLs against internal/private networks using isSSRFSafeURL(), but only checks the initial URL. When the initial URL responds with an HTTP redirect (Location header), the redirect target is fetched via fakeBrowser() without re-validation, allowing an attacker to reach internal services (cloud metadata, RFC1918 addresses) through an attacker-controlled redirect. This issue is fixed in version 26.0."
    },
    {
      "lang": "es",
      "value": "WWBN AVideo es una plataforma de vídeo de código abierto. En las versiones 25.0 e inferiores, el endpoint plugin/LiveLinks/proxy.php valida las URL proporcionadas por el usuario contra redes internas/privadas utilizando isSSRFSafeURL(), pero solo verifica la URL inicial. Cuando la URL inicial responde con una redirección HTTP (encabezado Location), el objetivo de la redirección se obtiene a través de fakeBrowser() sin revalidación, permitiendo a un atacante alcanzar servicios internos (metadatos de la nube, direcciones RFC1918) a través de una redirección controlada por el atacante. Este problema se corrige en la versión 26.0."
    }
  ],
  "lastModified": "2026-06-17T10:36:51.057",
  "configurations": [
    {
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        {
          "negate": false,
          "cpeMatch": [
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              "versionEndExcluding": "26.0"
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