CVE-2025-59835
High
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.
SeverityHigh
CVSS8.6
Exploit probability—
ProductLangBot
PublishedOct 2, 2025
First seenOct 2, 2025
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| langbot-app LangBot | >= 4.1.0, < 4.3.5 | — |
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