danny-avila LibreChat up to 0.8.0 POST Request iconURL cross site scripting

Summaryinfo

A vulnerability was found in danny-avila LibreChat up to 0.8.0 and classified as problematic. The affected element is an unknown function of the component POST Request Handler. Such manipulation of the argument iconURL leads to cross site scripting. This vulnerability is referenced as CVE-2025-66450. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in danny-avila LibreChat up to 0.8.0. Affected by this issue is an unknown code of the component POST Request Handler. The manipulation of the argument iconURL with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2025-66450 since 12/01/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Upgrading to version 0.8.1 eliminates this vulnerability. Applying the patch 6fa94d3eb8f5779363226d10dccf8b01a735744c is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Chat Software

Vendor

• danny-avila

Name

• LibreChat

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8.0

License

• open-source

Website

• Product: https://github.com/danny-avila/LibreChat/

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