CVE-2025-59835 — LangBot has a cross-directory file upload vulnerability, which could lead to system takeover
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…
Published: 2025-10-02 · CVSS: 8.6 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7