CVE-2025-66450
LibreChat JSON Injection in Chat POST Allows Remote Resource Inclusion and PXSS via Image Upload
- State
- Published
- Severity
- 8.6 High
- Published
- Dec 11, 2025
- Updated
- Dec 12, 2025
- Reserved
- Dec 1, 2025
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.6 High | 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 | GitHub_M |
Weaknesses
- CWE-80 Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Affected Products
| Product | Versions |
|---|---|
LibreChatdanny-avila |
|
References
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