CVE-2025-59691

{
  "id": "CVE-2025-59691",
  "sourceIdentifier": "[email protected]",
  "published": "2025-09-18T23:15:34.310",
  "lastModified": "2026-10-19T16:10:00.260",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "PureVPN client applications on Linux through September 2025 allow IPv6 traffic to leak outside the VPN tunnel upon network events such as Wi-Fi reconnect or system resume. In the CLI client, the VPN auto-reconnects and claims to be connected, but IPv6 traffic is no longer routed or blocked. In the GUI client, the IPv6 connection remains functional after disconnection until the user clicks Reconnect. In both cases, the real IPv6 address is exposed to external services, violating user privacy and defeating the advertised IPv6 leak protection. This affects CLI 2.0.1 and GUI 2.10.0."
    },
    {
      "lang": "es",
      "value": "Las aplicaciones cliente de PureVPN en Linux hasta septiembre de 2025 permiten que el tráfico IPv6 se filtre fuera del túnel VPN ante eventos de red como la reconexión de Wi-Fi o la reanudación del sistema. En el cliente CLI, la VPN se reconecta automáticamente y afirma estar conectada, pero el tráfico IPv6 ya no se enruta ni se bloquea. En el cliente GUI, la conexión IPv6 permanece funcional después de la desconexión hasta que el usuario hace clic en Reconnect. En ambos casos, la dirección IPv6 real queda expuesta a servicios externos, violando la privacidad del usuario y anulando la protección contra fugas de IPv6 anunciada. Esto afecta a CLI 2.0.1 y GUI 2.10.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "PureVPN",
          "product": "PureVPN",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "CLI 2.0.1",
              "versionType": "custom",
              "status": "affected"
            },
            {
              "version": "GUI 2.10.0",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "baseScore": 3.7,
          "baseSeverity": "LOW",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2025-09-19T13:08:42.717940Z",
          "id": "CVE-2025-59691",
          "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-669"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://anagogistis.com/posts/purevpn-ipv6-leak/",
      "source": "[email protected]"
    }
  ]
}