SiYuan has an arbitrary file deletion vulnerability

{
  "id": "d671ed1b8920e6a0a2747ec6f854abc8bd0ff3ed2488ee7e39ed45bc0d1add2f",
  "url": "https://osv.dev/vulnerability/CVE-2025-21609",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "SiYuan has an arbitrary file deletion vulnerability",
    "summary": "SiYuan is self-hosted, open source personal knowledge management software. SiYuan Note version 3.1.18 has an arbitrary file deletion vulnerability. The vulnerability exists in the `POST /api/history/getDocHistoryContent` endpoint. An attacker can craft a payload to exploit this vulnerability, resulting in the deletion of arbitrary files on the server. Commit d9887aeec1b27073bec66299a9a4181dc42969f3 fixes this vulnerability and is expected to be available in version 3.1.19.",
    "evidence": "osv:CVE-2025-21609",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-21609",
      "aliases": [
        "CVE-2025-21609",
        "GHSA-8fx8-pffw-w498",
        "GO-2025-3362"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/siyuan-note/siyuan",
              "type": "GIT",
              "events": [
                {
                  "introduced": "adc819973b71901ef0b163eb3f8dd85016bf0796"
                },
                {
                  "fixed": "d9887aeec1b27073bec66299a9a4181dc42969f3"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "= 3.1.18"
                      },
                      {
                        "last_affected": "= 3.1.18"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "fixed": "d9887aeec1b27073bec66299a9a4181dc42969f3"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.1.18-NA",
            "= 3.1.18",
            "v3.1.18"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21609.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:39.702033696Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21609.json",
        "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8fx8-pffw-w498",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-21609",
        "https://github.com/siyuan-note/siyuan/commit/d9887aeec1b27073bec66299a9a4181dc42969f3"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-459",
          "CWE-552"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21609.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-21609",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 507074,
  "published_at": "2025-01-03T16:26:36.42+00:00"
}