What is the CVSS score of CVE-2025-27409?

CVE-2025-27409 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.6%.

Which versions of Joplin are affected by CVE-2025-27409?

Organizations using Joplin face notable risk from CVE-2025-27409, a path traversal vulnerability rated CVSS 7.5.. A patch is available.

Is there a public PoC exploit available for CVE-2025-27409?

Yes, a public proof-of-concept exploit is available for CVE-2025-27409. Prioritise patching immediately. EPSS: 0.6%.

How to fix or mitigate CVE-2025-27409?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Review file handling controls and restrict upload directories.

Joplin CVE-2025-27409

HIGH

Path Traversal (CWE-22)

2025-04-30 security-advisories@github.com

Path Traversal Joplin Joplin Project

7.5

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:39 vuln.today

Patch released

Mar 28, 2026 - 18:39 nvd

Patch available

PoC Detected

May 16, 2025 - 16:29 vuln.today

Public exploit code

CVE Published

Apr 30, 2025 - 15:16 nvd

HIGH 7.5

DescriptionGitHub Advisory

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.

AnalysisAI

Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Path Traversal (CWE-22), which allows attackers to access files and directories outside the intended path. 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. Affected products include: Joplin Project Joplin. Version information: version 3.3.3.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate and canonicalize file paths. Use chroot or sandboxing. Reject input containing path separators or '../' sequences.