CVE-2025-66450

Name: CVE-2025-66450
Creator: NVD / NIST
Published: 2025-12-11T22:15:56.153+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.6/10EPSS 0.18%

Last modified Jun 17, 2026

CVE-2025-66450 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. 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. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS 4.0

8.6/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.18%

7.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-80

Affected Software

Vendor	Product	Versions
Librechat	Librechat	< 0.8.1

References

https://github.com/danny-avila/LibreChat/commit/6fa94d3eb8f5779363226d10dccf8b01a735744cPatch
https://github.com/danny-avila/LibreChat/security/advisories/GHSA-84vx-vmcf-xgppExploit, Vendor Advisory

Timeline

Published: Dec 11, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-66450?

How severe is CVE-2025-66450?

CVE-2025-66450 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.

How do I fix CVE-2025-66450?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-66450?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST