CVE-2025-66450

CVE-2025-66450 is a medium-severity vulnerability in Librechat with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-80.

Key facts

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.

Frequently asked questions

What is CVE-2025-66450?
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.
How severe is CVE-2025-66450?
CVE-2025-66450 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-66450 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66450?
CVE-2025-66450 affects Librechat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66450?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-66450 have an EU (EUVD) identifier?
Yes. CVE-2025-66450 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-202930.
When was CVE-2025-66450 published?
CVE-2025-66450 was published on 2025-12-11 and last updated on 2026-06-17.

References

Affected products (1)

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