CVE-2025-21609CRITICAL 9.1EPSS p43.1%

CVE-2025-21609CVE-2025-21609

Description

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.

Scoring

CVSS 3.19.1 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
EPSS0.58% probability of exploitation · percentile 43.1% · 2026-06-19T12:03:05Z
Published2025-01-03
Last modified2025-05-14

Underlying weaknesses· 2

CWE-459CWE-552

References

  1. https://github.com/siyuan-note/siyuan/commit/d9887aeec1b27073bec66299a9a4181dc42969f3
  2. https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8fx8-pffw-w498

2

TypeTargetConfidenceTier
WeaknessIncomplete Cleanupcwe-4590%live
WeaknessFiles or Directories Accessible to External Partiescwe-5520%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.