CVE-2025-59835

HIGH EPSS 30.0%
Published Oct 2, 20259mo ago · Modified Jun 17, 20262w ago
8.6 CVSS 4.0
High
Find Similar
Published Oct 2, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
8.6
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
30.0% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-23
CWE-434 Unrestricted Upload of File with Dangerous Type Resource Mgmt

References 3

  • github.com https://github.com/langbot-app/LangBot/pull/1691
  • github.com https://github.com/langbot-app/LangBot/releases/tag/v4.3.5
  • github.com https://github.com/langbot-app/LangBot/security/advisories/GHSA-7j3j-qj83-9qv4

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.