Security advisory

{
  "id": "2eb39377229f4306630cbe0254a175eed638c400bb7021da1563a88b5f370400",
  "url": "https://osv.dev/vulnerability/CVE-2021-27231",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-27231",
    "summary": "Hestia Control Panel 1.3.5 and below, in a shared-hosting environment, sometimes allows remote authenticated users to create a subdomain for a different customer's domain name, leading to spoofing of services or email messages.",
    "evidence": "osv:CVE-2021-27231",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-27231",
      "aliases": [
        "CVE-2021-27231"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/hestiacp/hestiacp",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "3d60e15dd8381a2d3d708d4f93faa3de07adb979"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:hestiacp:control_panel:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.3.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.3.5",
            "1.3.4",
            "1.3.2",
            "1.3.1",
            "1.3.0",
            "1.2.0",
            "1.0.1",
            "1.00.0-190618",
            "0.9.8-28"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-27231.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:35.054218672Z",
      "provider": "osv",
      "references": [
        "https://github.com/hestiacp/hestiacp/issues/1622",
        "https://github.com/sickcodes/security/blob/master/advisories/sick-2021-006.md",
        "https://www.hestiacp.com/",
        "https://sick.codes/sick-2021-006"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-27231",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 385651,
  "published_at": "2021-02-16T04:15:12.827+00:00"
}