CVE-2025-66450CWE-80

CVE-2025-66450

Medium · published December 12, 2025

CVSS v3.1
5.4
EPSS
0%
Percentile
11.0
In the wild
Unconfirmed
What it is

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 record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00213 · 11.0th percentile
Weakness
CWE-80 · Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Published
2025-12-12T03:15Z
Affected products (1)
ProductVersionsFixed in
librechat/librechat< 0.8.10.8.1
References (2)
https://github.com/danny-avila/LibreChat/commit/6fa94d3eb8f5779363226d10dccf8b01a735744c · [email protected]https://github.com/danny-avila/LibreChat/security/advisories/GHSA-84vx-vmcf-xgpp · [email protected]
EPSS history
Timeline
  • 11 DEC 22:05Z
    LibreChat JSON Injection in Chat POST Allows Remote Resource Inclusion and PXSS via Image Upload
    cvelistv5