CVE-2025-6853

Name: CVE-2025-6853
Creator: NVD / NIST
Published: 2025-06-29T08:15:21.55+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.1/10EPSS 0.48%

Last modified Jun 17, 2026

CVE-2025-6853 is a low-severity vulnerability rated 2.1/10 on the CVSS scale. A vulnerability classified as critical has been found in chatchat-space Langchain-Chatchat up to 0.3.1. This affects the function upload_temp_docs of the file /knowledge_base/upload_temp_docs of the component Backend. EPSS estimates a 0.48% chance of exploitation in the next 30 days.

Description

A vulnerability classified as critical has been found in chatchat-space Langchain-Chatchat up to 0.3.1. This affects the function upload_temp_docs of the file /knowledge_base/upload_temp_docs of the component Backend. The manipulation of the argument flag leads to path traversal. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

2.1/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/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

EPSS Probability

0.48%

37.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Chatchat-Space	Langchain-Chatchat	<= 0.3.1

References

https://github.com/chatchat-space/Langchain-Chatchat/issues/5352Exploit, Issue Tracking
https://vuldb.com/?ctiid.314325Permissions Required, VDB Entry
https://vuldb.com/?id.314325Third Party Advisory, VDB Entry
https://vuldb.com/?submit.601155Third Party Advisory, VDB Entry
https://github.com/chatchat-space/Langchain-Chatchat/issues/5352Exploit, Issue Tracking

Timeline

Published: Jun 29, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-6853?

How severe is CVE-2025-6853?

CVE-2025-6853 has a CVSS score of 2.1/10 (LOW severity). The EPSS model estimates a 0.48% probability of exploitation in the next 30 days.

How do I fix CVE-2025-6853?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-6853?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST