Vulnerability · Published Aug 12, 2025 · Assigned by GitHub_M

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

Medium 6.4

In plain English

A medium-severity path traversal in kanboard from kanboard. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.4Medium

Exploit odds (30 days)0.4%top 66.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:14	kanboard	1.2.47+ds-1	DEBIAN-CVE-2025-55011

Affected products (as reported)

Vendor	Product	Versions
kanboard	kanboard	< 1.2.47

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

References

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