CVE-2025-55011 Kanboard Path Traversal in File Write via Task File Upload Api
Attackers can write arbitrary files to the server via the task file upload API due to missing path validation, potentially modifying system files.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-55011?
CVE-2025-55011 is a medium-severity path traversal vulnerability in kanboard, published on 12 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-22
Which versions are affected by CVE-2025-55011?
It affects 1 product.
Products include Kanboard Kanboard.
How do I fix CVE-2025-55011?
No fix has been published for CVE-2025-55011 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2025-55011 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-55011 exists.
Other vulnerabilities in kanboard
- CVE-2026-21881 Kanboard is Vulnerable to Reverse Proxy Authentication Bypass
- CVE-2025-55010 Kanboard Authenticated Admin Remote Code Execution via Unsafe Deserialization of Events
- CVE-2024-51747 Arbitrary File Read and Delete in kanboard
- CVE-2024-51748 Remote code execution through language setting in kanboard
- CVE-2017-12850 Business logic in n/a
Sources
Also known as GHSA-26f4-rx96-xc55.