CVE-2025-66450
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-11

Last updated on: 2025-12-15

Assigner: GitHub, Inc.

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.
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Meta Information
Published
2025-12-11
Last Modified
2025-12-15
Generated
2026-06-16
AI Q&A
2025-12-12
EPSS Evaluated
2026-06-15
NVD
CVE-2025-66450
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
librechat librechat to 0.8.1 (exc)
Helpful Resources
Exploitability
CWE
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KEV
KEV Icon
CWE ID Description
CWE-80 The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.
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Executive Summary

In LibreChat versions 0.8.0 and below, an attacker can modify the iconURL parameter in a POST request when posting a question. This allows malicious code to be stored in the chat, which can then be shared with other users. When users view the shared chat containing this malicious tracker, resources loaded can lead to loss of privacy.

Compliance Impact

The vulnerability can lead to loss of privacy for users who view the shared chat links containing malicious trackers. This privacy loss could potentially impact compliance with privacy regulations such as GDPR and HIPAA, which require protection of personal data and user privacy. However, specific compliance impacts are not detailed in the provided information.

Impact Analysis

This vulnerability can lead to loss of privacy for users who view shared chat links containing malicious trackers. Attackers can inject malicious code that is stored and shared, potentially exposing users to privacy risks when they access these chats.

Detection Guidance

You can detect this vulnerability by monitoring POST requests to the LibreChat application and inspecting the iconURL parameter for unexpected or malicious modifications. Look for POST requests where the iconURL parameter contains suspicious URLs or code. Network traffic analysis tools like Wireshark or command-line tools like curl or tcpdump can be used to capture and analyze such requests. For example, using curl to replay or inspect POST requests or using grep to search server logs for iconURL parameter usage may help identify exploitation attempts.

Mitigation Strategies

The immediate mitigation step is to upgrade LibreChat to version 0.8.1 or later, where this vulnerability is fixed. Additionally, you can implement input validation and sanitization on the iconURL parameter to prevent malicious code injection. Restricting or monitoring shared chat links for suspicious resource loading can also help reduce privacy risks.

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