CVE-2025-66450— LibreChat JSON Injection in Chat POST Allows Remote Resource Inclusion and PXSS via Image Upload
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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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
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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|---|
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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
- CVE-2026-34371
LibreChat Affected by Arbitrary File Write via `execute_code - CVE-2026-31951
LibreChat's MCP Server Header Injection Enables OAuth Token - CVE-2026-31950
LibreChat's IDOR in SSE Stream Subscription Allows Reading O - CVE-2026-31945
LibreChat Server-Side Request Forgery using DNS resolution - CVE-2026-31943
LibreChat has SSRF protection bypass via IPv4-mapped IPv6 no
Same vendor: danny-avila
- CVE-2026-34371
LibreChat Affected by Arbitrary File Write via `execute_code - CVE-2026-31951
LibreChat's MCP Server Header Injection Enables OAuth Token - CVE-2026-31950
LibreChat's IDOR in SSE Stream Subscription Allows Reading O - CVE-2026-31945
LibreChat Server-Side Request Forgery using DNS resolution - CVE-2026-31943
LibreChat has SSRF protection bypass via IPv4-mapped IPv6 no
Same weakness: CWE-80
- CVE-2021-47948
WordPress GetPaid Plugin 2.4.6 HTML Injection via Help Text - CVE-2026-42030
MapServer: Improper Neutralization of Script-Related HTML Ta - CVE-2026-44264
Weblate is vulnerable to XSS via crafted Markdown - CVE-2026-6002
HTML Injection in DivvyDrive Information Technologies' Divvy - CVE-2025-59854
HCL DFXAnalytics is affected by an Insecure Security Header
V. Comments for CVE-2025-66450
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