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TI-2025-20244 Aliases CVE-2025-27409

Joplin Server Vulnerable to Path Traversal

Priority HIGH 72CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-22 and the CVSS impact.

Summary

Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. Prior to version 3.3.3, path traversal is possible in Joplin Server if static file path starts with `css/pluginAssets` or `js/pluginAssets`. The `findLocalFile` function in the `default route` calls `localFileFromUrl` to check for special `pluginAssets` paths. If the function returns a path, the result is returned directly, without checking for path traversal. The vulnerability allows attackers to read files outside the intended directories. This issue has been patched in version 3.3.3.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0066 51st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed joplin (laurent22): 3.3.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
laurent22joplinbefore 3.3.33.3.3Patch availableCNA
  • joplin Vendorlaurent22 Affected before 3.3.3 Fixed in 3.3.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:joplin_project:joplin:*:*:*:*:*:-:*:*before 3.3.3Vulnerablelaurent22
  • cpe:2.3:a:joplin_project:joplin:*:*:*:*:*:-:*:* Versions before 3.3.3 Vulnerable ·laurent22

Remediation

  • Fix · CNA joplin (laurent22) Fixed in 3.3.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-27409
  2. 2026-10-16 EPSS moved to the 50th–90th percentile

References

Exploit 1

Patch 1

  • TI-2023-24472 Arbitrary code execution on click of PDF links in Joplin CVSS 3.1CRITICAL 9.0
  • TI-2024-32950 Remote Code Execution on click of <a> Link in markdown preview CVSS 3.1CRITICAL 9.6
  • TI-2024-27054 Joplin has a parsing error leading to Cross-site Scripting (XSS) CVSS 3.1CRITICAL 9.7
  • TI-2025-17795 Cross-site Scripting (XSS) in Rich Text Editor allows arbitrary code execution in Joplin CVSS 3.1CRITICAL 9.6
  • TI-2025-19991 Privilege escalation in Joplin server via user patch endpoint CVSS 3.1HIGH 8.8
  • TI-2024-35730 Lack of validation on openExternal allows 1 click remote code execution in joplin CVSS 3.1HIGH 8.8
See all 21 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences