CVE-2025-66451

LibreChat is a ChatGPT clone with additional features. In versions 0.8.0 and below, when creating prompts, JSON requests are sent to define and modify the prompts via PATCH endpoint for prompt groups (/api/prompts/groups/:groupId). However, the request bodies are not sufficiently validated for proper input, enabling users to modify prompts in a way that was not intended as part of the front end system. The patchPromptGroup function passes req.body directly to updatePromptGroup() without filtering sensitive fields. This issue is fixed in version 0.8.1.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/danny-avila/LibreChat/commit/01413eea3d3c1454d32ca9704fa9640407839737	Patch
https://github.com/danny-avila/LibreChat/security/advisories/GHSA-vpqq-5qr4-655h	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:librechat:librechat:*:*:*:*:*:*:*:*

History

15 Dec 2025, 17:51

Type	Values Removed	Values Added
CPE		cpe:2.3:a:librechat:librechat::::::::
First Time		Librechat Librechat librechat
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.5
References	~~() https://github.com/danny-avila/LibreChat/commit/01413eea3d3c1454d32ca9704fa9640407839737 -~~	() https://github.com/danny-avila/LibreChat/commit/01413eea3d3c1454d32ca9704fa9640407839737 - Patch
References	~~() https://github.com/danny-avila/LibreChat/security/advisories/GHSA-vpqq-5qr4-655h -~~	() https://github.com/danny-avila/LibreChat/security/advisories/GHSA-vpqq-5qr4-655h - Exploit, Vendor Advisory

11 Dec 2025, 23:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-12-11 23:15

Updated : 2025-12-15 17:51

NVD link : CVE-2025-66451

Mitre link : CVE-2025-66451

CVE.ORG link : CVE-2025-66451

JSON object : View

Products Affected

librechat

librechat

CWE

CWE-20

Improper Input Validation

CWE-915

Improperly Controlled Modification of Dynamically-Determined Object Attributes

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