{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2023-39962",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-39962",
    "idYear": 2023,
    "status": "PUBLISHED",
    "publishedAt": "2023-08-10T17:23:50.261Z",
    "updatedAt": "2024-10-03T19:54:43.544Z",
    "importedAt": "2026-10-24T01:56:58.683Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Users can delete external storage mount points",
      "summary": "Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 19.0.0 and prior to versions 19.0.13.10, 20.0.14.15, 21.0.9.13, 22.2.10.14, 23.0.12.8, 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1, a malicious user could delete any personal or global external storage, making them inaccessible for everyone else as well. Nextcloud server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 19.0.13.10, 20.0.14.15, 21.0.9.13, 22.2.10.14, 23.0.12.9, 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1 contain a patch for this issue. As a workaround, disable app files_external. This also makes the external storage inaccessible but retains the configurations until a patched version has been deployed.",
      "affected": [
        {
          "vendor": "nextcloud",
          "product": "security-advisories",
          "versions": [
            {
              "version": ">= 19.0.0, < 19.0.13.10",
              "status": "affected"
            },
            {
              "version": ">= 20.0.0, < 20.0.14.15",
              "status": "affected"
            },
            {
              "version": ">= 21.0.0, < 21.0.9.13",
              "status": "affected"
            },
            {
              "version": ">= 22.0.0, < 22.2.10.14",
              "status": "affected"
            },
            {
              "version": ">= 23.0.0, < 23.0.12.9",
              "status": "affected"
            },
            {
              "version": ">= 24.0.0, < 24.0.12.5",
              "status": "affected"
            },
            {
              "version": ">= 25.0.0, < 25.0.9",
              "status": "affected"
            },
            {
              "version": ">= 26.0.0, < 26.0.4",
              "status": "affected"
            },
            {
              "version": ">= 27.0.0, < 27.0.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  }
}