Authenticated arbitrary file write via unchecked task ID
Published Aug 12, 2025 · Updated Aug 12, 2025
Path traversal in Kanboard before 1.2.47 allows remote authenticated users to write files outside task storage through the JSON-RPC API. The createTaskFile method accepts an unchecked task_id, FileModel::generatePath places it directly in an object key, and FileStorage::put writes that key without enforcing its base directory. Project access and API credentials are required; the filename is hashed without an extension, limiting direct execution, although manual deployments can expose writable executable locations.
Summary
What happened
Path traversal in Kanboard before 1.2.47 allows remote authenticated users to write files outside task storage through the JSON-RPC API. The createTaskFile method accepts an unchecked task_id, FileModel::generatePath places it directly in an object key, and FileStorage::put writes that key without enforcing its base directory. Project access and API credentials are required; the filename is hashed without an extension, limiting direct execution, although manual deployments can expose writable executable locations.
The record
- CVE
- CVE-2025-55011
- Published
- Aug 12, 2025
- Updated
- Aug 12, 2025
- Vendor
- Kanboard
- Product
- Kanboard
- Classifications
- CWE-22, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 12, 2025CVE publishedPublication date reported by the CVE source.
- Aug 12, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 1.2.47
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- createTaskFile JSON-RPC path-traversal proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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