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CVE-2026-43985

Estado: AplazadaAlta (8.8)—

Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Versions prior to 2.17.1 expose `configUpdate` as a state-changing administrator endpoint, but the route does not enforce `POST` and does not use any anti-CSRF token. In the default form and JWT-based authentication mode, the administrator session cookie is issued with `SameSite=Lax`, which still permits top-level cross-site navigation requests. An attacker can exploit this by luring a logged-in administrator to a malicious page that submits a cross-site request to `/configUpdate` and overwrites the local administrator username and password. The attacker can then sign in directly with the chosen credentials and take over the Tautulli administrative interface. Version 2.17.1 patches the issue.

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.

XSS/CSRF contra administrador autenticado (UI:R, SameSite=Lax) permite sobrescribir credenciales y secuestrar la sesión administrativa de Tautulli.

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

User TrainingRestrict Web-Based ContentPassword PoliciesMulti-factor AuthenticationApplication Isolation and SandboxingExploit Protection

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Tautulli — TautulliAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-43985",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-43985",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-06-04T17:51:21.123267Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "Tautulli",
          "product": "Tautulli",
          "versions": [
            {
              "status": "affected",
              "version": "< 2.17.1"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-06-04T16:16:38.083",
  "references": [
    {
      "url": "https://github.com/Tautulli/Tautulli/releases/tag/v2.17.1",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/Tautulli/Tautulli/security/advisories/GHSA-v622-pmjj-gpx3",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/Tautulli/Tautulli/security/advisories/GHSA-v622-pmjj-gpx3",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
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      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-352"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Versions prior to 2.17.1 expose `configUpdate` as a state-changing administrator endpoint, but the route does not enforce `POST` and does not use any anti-CSRF token. In the default form and JWT-based authentication mode, the administrator session cookie is issued with `SameSite=Lax`, which still permits top-level cross-site navigation requests. An attacker can exploit this by luring a logged-in administrator to a malicious page that submits a cross-site request to `/configUpdate` and overwrites the local administrator username and password. The attacker can then sign in directly with the chosen credentials and take over the Tautulli administrative interface. Version 2.17.1 patches the issue."
    },
    {
      "lang": "es",
      "value": "Tautulli es una herramienta de monitoreo y seguimiento basada en Python para Plex Media Server. Las versiones anteriores a la 2.17.1 exponen 'configUpdate' como un endpoint de administrador que cambia el estado, pero la ruta no fuerza 'POST' y no utiliza ningún token anti-CSRF. En el modo de autenticación predeterminado basado en formulario y JWT, la cookie de sesión del administrador se emite con 'SameSite=Lax', lo que aún permite solicitudes de navegación entre sitios de nivel superior. Un atacante puede explotar esto atrayendo a un administrador que ha iniciado sesión a una página maliciosa que envía una solicitud entre sitios a /configUpdate y sobrescribe el nombre de usuario y la contraseña del administrador local. El atacante puede entonces iniciar sesión directamente con las credenciales elegidas y tomar el control de la interfaz administrativa de Tautulli. La versión 2.17.1 corrige el problema."
    }
  ],
  "lastModified": "2026-07-22T20:10:00.127",
  "sourceIdentifier": "security-advisories@github.com"
}