{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "15.0.14"
              },
              {
                "introduced": "16.0.0"
              },
              {
                "fixed": "16.0.7"
              },
              {
                "introduced": "17.0.0"
              },
              {
                "fixed": "17.0.2"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "dd0b38876d11d81776c9e12bdcc31142059a983e"
            },
            {
              "introduced": "6781f9fc7652f735a75abd869ab3e79878fceec9"
            },
            {
              "fixed": "afa23942a508c16dc99bf6031d522a4d9539bb3a"
            },
            {
              "introduced": "c937c8f1753b111086e28afa396f3abd5776b1db"
            },
            {
              "fixed": "8306acc940c0c8d4c0c3798b742d6ca8be3fcff0"
            }
          ],
          "repo": "https://github.com/nextcloud/server",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {},
  "details": "A missing check for IPv4 nested inside IPv6 in Nextcloud server \u003c 17.0.1, \u003c 16.0.7, and \u003c 15.0.14 allowed a Server-Side Request Forgery (SSRF) vulnerability when subscribing to a malicious calendar URL.",
  "id": "CVE-2020-8138",
  "modified": "2026-08-07T11:31:19.309976504Z",
  "published": "2020-03-20T21:15:17.547Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nextcloud.com/security/advisory/?id=NC-SA-2020-014"
    },
    {
      "type": "EVIDENCE",
      "url": "https://hackerone.com/reports/736867"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}