CVE-2025-59835CWE-23CWE-434unrestricted-file-upload

CVE-2025-59835

published October 2, 2025

CVSS
8.6
EPSS
0%
Percentile
35.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
8.6 · NONE
CVSS v4.0
Not supplied
EPSS
0.00419 · 35.1th percentile
Weaknesses
CWE-23 · Relative Path Traversal; CWE-434 · Unrestricted Upload of File with Dangerous Type
Published
2025-10-02T23:15Z
References (3)
https://github.com/langbot-app/LangBot/pull/1691 · [email protected]https://github.com/langbot-app/LangBot/releases/tag/v4.3.5 · [email protected]https://github.com/langbot-app/LangBot/security/advisories/GHSA-7j3j-qj83-9qv4 · [email protected]
EPSS history
Timeline
  • 02 OCT 18:59Z
    LangBot has a cross-directory file upload vulnerability, which could lead to system takeover
    cvelistv5