CVE-2025-59835 - CVE House
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Status published High CVE-2025-59835

LangBot has a cross-directory file upload vulnerability, which could lead to system takeover

Vulnerability Description

LangBot is a global IM bot platform designed for LLMs. In versions 4.1.0 up to but not including 4.3.5, authorized attackers can exploit the /api/v1/files/documents interface to perform arbitrary file uploads. Since this interface does not strictly restrict the storage directory of files on the server, it is possible to upload dangerous files to specific system directories. This is fixed in version 4.3.5.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

Affected Vendor

langbot-app

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Affected Software

LangBot
Vulnerable Versions:
>= 4.1.0, < 4.3.5

Timeline

Official Publish: October 2nd, 2025
Last Modified: October 2nd, 2025
Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)