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Description

LibreChat is a ChatGPT clone with additional features. In versions 0.8.0 and below, there is no handler for JSON parsing errors; SyntaxError from express.json() includes user input in the error message, which gets reflected in responses. User input (including HTML/JavaScript) can be exposed in error responses, creating an XSS risk if Content-Type isn't strictly enforced. This issue does not have a fix at the time of publication.

PUBLISHED Reserved 2025-12-01 | Published 2025-12-11 | Updated 2025-12-12 | Assigner GitHub_M




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

<= 0.8.1
affected

References

github.com/...reChat/security/advisories/GHSA-q6c5-gvj5-c264

cve.org (CVE-2025-66452)

nvd.nist.gov (CVE-2025-66452)

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Data based on CVE®. Copyright © 1999-2025, The MITRE Corporation. All rights reserved.