langbot-app LangBot up to 4.3.4 /api/v1/files/documents path traversal

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in langbot-app LangBot up to 4.3.4. This affects an unknown part of the file /api/v1/files/documents. Executing a manipulation can lead to path traversal. This vulnerability is tracked as CVE-2025-59835. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in langbot-app LangBot up to 4.3.4 and classified as critical. This vulnerability affects an unknown part of the file /api/v1/files/documents. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-23. The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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 advisory is shared for download at github.com. This vulnerability was named CVE-2025-59835 since 09/22/2025. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 4.3.5 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-23 / CWE-22
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: LangBot 4.3.5
Patch: github.com

Timelineinfo

09/22/2025 CVE reserved
10/03/2025 +11 days Advisory disclosed
10/03/2025 +0 days VulDB entry created
10/03/2025 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-7j3j-qj83-9qv4
Status: Confirmed

CVE: CVE-2025-59835 (🔒)
GCVE (CVE): GCVE-0-2025-59835
GCVE (VulDB): GCVE-100-326812

Entryinfo

Created: 10/03/2025 06:50
Changes: 10/03/2025 06:50 (69)
Complete: 🔍
Cache ID: 216::103

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