Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1000 CNY

100.0%
Buy Us a Coffee

CVE-2025-66452— LibreChat's lack of JSON parsing error handling can lead to XSS

EPSS 0.03% · P8
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2025-66452

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
LibreChat's lack of JSON parsing error handling can lead to XSS
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
LibreChat 跨站脚本漏洞
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及之前版本存在跨站脚本漏洞，该漏洞源于未处理JSON解析错误，可能导致跨站脚本攻击。
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

VendorProductAffected VersionsCPESubscribe
danny-avilaLibreChat <= 0.8.1 -

II. Public POCs for CVE-2025-66452

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2025-66452

请登录查看更多情报信息。

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

CVE-2025-66450LibreChat JSON Injection in Chat POST Allows Remote Resource Inclusion and PXSS via Image
CVE-2025-66451LibreChat's Improper Input Validation in Prompt Creation API Enables Unauthorized Permissi

IV. Related Vulnerabilities

Same product: LibreChat
Same vendor: danny-avila
Same weakness: CWE-79

V. Comments for CVE-2025-66452

No comments yet

Leave a comment