CVE-2025-66488

{
  "id": "CVE-2025-66488",
  "cveTags": [],
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          "id": "CVE-2025-66488",
          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-01-28T18:28:39.719089Z"
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        "type": "Secondary",
        "source": "security-advisories@github.com",
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          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 4.6,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 2.5,
        "exploitabilityScore": 2.1
      },
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        "source": "nvd@nist.gov",
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          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
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        "impactScore": 2.7,
        "exploitabilityScore": 2.8
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  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "discourse",
          "product": "discourse",
          "versions": [
            {
              "status": "affected",
              "version": "< 3.5.4"
            },
            {
              "status": "affected",
              "version": ">= 2025.11.0-latest, < 2025.11.2"
            },
            {
              "status": "affected",
              "version": ">= 2025.12.0-latest, < 2025.12.1"
            },
            {
              "status": "affected",
              "version": ">= 2026.1.0-latest, < 2026.1.0"
            }
          ]
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  ],
  "published": "2026-01-28T19:16:22.453",
  "references": [
    {
      "url": "https://github.com/discourse/discourse/security/advisories/GHSA-68jp-3934-62rx",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-116"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Discourse is an open source discussion platform. A vulnerability present in versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0 affects anyone who uses S3 for uploads. While scripts may be executed, they will only be run in the context of the S3/CDN domain, with no site credentials. Versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0 fix the issue. As a workaround, disallow html or xml files for uploads in authorized_extensions. For existing html xml uploads, site owners can consider deleting them."
    },
    {
      "lang": "es",
      "value": "Discourse es una plataforma de discusión de código abierto. Una vulnerabilidad presente en versiones anteriores a 3.5.4, 2025.11.2, 2025.12.1 y 2026.1.0 afecta a cualquiera que use S3 para cargas. Aunque se pueden ejecutar los scripts, solo se hará en el contexto del dominio S3/CDN, sin credenciales del sitio. Las versiones 3.5.4, 2025.11.2, 2025.12.1 y 2026.1.0 solucionan el problema. Como solución alternativa, se recomienda no permitir archivos html o xml para cargas en authorized_extensions. Para las cargas existentes de html xml, los propietarios del sitio pueden considerar eliminarlas."
    }
  ],
  "lastModified": "2026-06-17T09:56:55.357",
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