CVE-2025-66451

MEDIUM EPSS 19.7%
Published Dec 11, 20256mo ago · Modified Jun 17, 20262w ago
5.3 CVSS 4.0
Medium
Find Similar
Published Dec 11, 2025 6mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.3
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/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
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction P
Scope X

Threat Intelligence

EPSS Exploit Probability
19.7% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 2

CWE-20 Improper Input Validation Validation
CWE-915

Affected Products 1

VendorProductVersionRange
librechatlibrechat* <0.8.1

References 2

  • github.com https://github.com/danny-avila/LibreChat/commit/01413eea3d3c1454d32ca9704fa9640407839737
    Patch
  • github.com https://github.com/danny-avila/LibreChat/security/advisories/GHSA-vpqq-5qr4-655h
    ExploitVendor Advisory

Remediation

  • github.com https://github.com/danny-avila/LibreChat/commit/01413eea3d3c1454d32ca9704fa9640407839737
    Patch