What’s Vulnerable › Vulnerabilities

CVE-2025-55011: Kanboard Path Traversal in File Write via Task File Upload Api

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-08-12 · updated 2026-06-17
• Weakness: CWE-22

Description

Kanboard is project management software that focuses on the Kanban methodology. Prior to version 1.2.47, the createTaskFile method in the API does not validate whether the task_id parameter is a valid task id, nor does it check for path traversal. As a result, a malicious actor could write a file anywhere on the system the app user controls. The impact is limited due to the filename being hashed and having no extension. This issue has been patched in version 1.2.47.

Affected products

• kanboard: before 1.2.47 — fixed in 1.2.47

How to fix

Upgrade to a fixed version: kanboard 1.2.47. Check the vendor advisory for mitigations.

References

• https://github.com/kanboard/kanboard/blob/b2e35ac520add67cff792aab960b3c002c48e3d0/app/Api/Procedure/TaskFileProcedure.php#L47-L57
• https://github.com/kanboard/kanboard/commit/523a6135e944b6884c091a3fd7605af8ef133681
• https://github.com/kanboard/kanboard/security/advisories/GHSA-26f4-rx96-xc55
• https://github.com/kanboard/kanboard/security/advisories/GHSA-26f4-rx96-xc55

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