Security advisory

{
  "id": "17a34458f0fe22a79cf8e4b893c3969b199ec85d0d0193d20b87672a4277e11f",
  "url": "https://osv.dev/vulnerability/CVE-2020-21057",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-21057",
    "summary": "Directory Traversal vulnerability in FusionPBX 4.5.7, which allows a remote malicious user to delete folders on the system via the folder variable to app/edit/folderdelete.php.",
    "evidence": "osv:CVE-2020-21057",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-21057",
      "aliases": [
        "CVE-2020-21057"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/fusionpbx/fusionpbx",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "026c3958c3c7ca6b2ff067addc991aac8f41cf11"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "026c3958c3c7ca6b2ff067addc991aac8f41cf11"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-21057.json"
          }
        }
      ],
      "modified": "2026-10-20T10:52:09.381010678Z",
      "provider": "osv",
      "references": [
        "https://github.com/fusionpbx/fusionpbx/commit/026c3958c3c7ca6b2ff067addc991aac8f41cf11",
        "https://resp3ctblog.wordpress.com/2019/10/28/fusionpbx-path-traversal-4/"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:fusionpbx:fusionpbx:4.5.7:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fusionpbx:fusionpbx",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "4.5.7"
                  },
                  {
                    "last_affected": "4.5.7"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-21057",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 383408,
  "published_at": "2021-05-20T16:15:07.857+00:00"
}