CVE-2025-66451

MEDIUM

LibreChat < 0.8.1 - Improperly Controlled Modification of Dynamically-Determined Object Attributes via PATCH Endpoint

Title source: llm
STIX 2.1

Description

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.

References (2)

Core 2

Scores

CVSS v3 6.5
EPSS 0.0028
EPSS Percentile 19.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-915 CWE-20
Status published
Products (1)
librechat/librechat < 0.8.1
Published Dec 11, 2025
Tracked Since Feb 18, 2026