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CVE-2025-66450— LibreChat JSON Injection in Chat POST Allows Remote Resource Inclusion and PXSS via Image Upload

Quick assessment

Affected
danny-avila LibreChat
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

LibreChat是Danny Avila个人开发者的一个增强的 ChatGPT 克隆。 LibreChat 0.8.0及之前版本存在安全漏洞，该漏洞源于iconURL参数可被修改，可能导致存储型跨站脚本攻击和隐私泄露。

AI Predicted 6.5 Difficulty: Easy EPSS 0.21% · P11
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I. Basic Information for CVE-2025-66450

Vulnerability Information
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Vulnerability Title
LibreChat JSON Injection in Chat POST Allows Remote Resource Inclusion and PXSS via Image Upload
Source: CVE Program / CVE List V5
Vulnerability Description
LibreChat is a ChatGPT clone with additional features. In versions 0.8.0 and below, when a user posts a question, the iconURL parameter of the POST request can be modified by an attacker. The malicious code is then stored in the chat which can then be shared to other users. When sharing chats with a potentially malicious “tracker”, resources loaded can lead to loss of privacy for users who view the chat link that is sent to them. This issue is fixed in version 0.8.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
Web页面中脚本相关HTML标签转义处理不恰当(基本跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
LibreChat 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LibreChat是Danny Avila个人开发者的一个增强的 ChatGPT 克隆。 LibreChat 0.8.0及之前版本存在安全漏洞，该漏洞源于iconURL参数可被修改，可能导致存储型跨站脚本攻击和隐私泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
danny-avila LibreChat < 0.8.1 -

II. Public POCs for CVE-2025-66450

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III. Intelligence Information for CVE-2025-66450

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Patches & Fixes for CVE-2025-66450 (1)

Vendor Advisories for CVE-2025-66450 (1)

Same Patch Batch · danny-avila · 2025-12-11 · 3 CVEs total

CVE-2025-66451 LibreChat's Improper Input Validation in Prompt Creation API Enables Unauthorized Permissi
CVE-2025-66452 LibreChat's lack of JSON parsing error handling can lead to XSS

IV. Related Vulnerabilities

Same product: LibreChat
Same vendor: danny-avila
Same weakness: CWE-80

V. Comments for CVE-2025-66450

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