CVE-2025-66450: LibreChat JSON Injection in Chat POST Allows Remote Resource Inclusion and PXSS via Image Upload
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.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2025-66450?
CVE-2025-66450 is classified as a high severity vulnerability due to the potential for stored malicious code execution.
How do I fix CVE-2025-66450?
To fix CVE-2025-66450, upgrade LibreChat to version 0.8.1 or later to remove the vulnerability.
What kind of attack does CVE-2025-66450 enable?
CVE-2025-66450 enables stored cross-site scripting (XSS) attacks via the iconURL parameter.
What versions are affected by CVE-2025-66450?
CVE-2025-66450 affects LibreChat versions 0.8.0 and below.
Who is impacted by CVE-2025-66450?
Users of LibreChat versions 0.8.0 and earlier are at risk of being affected by CVE-2025-66450.