CVE-2025-66451: LibreChat is a ChatGPT clone with additional features. In versions 0.8.0 and below, when creating prompts, JSON…
CVE-2025-66451 · Severity: medium · CVSS 6.5 · Published 2025-12-11
LibreChat is a ChatGPT clone with additional features. In versions 0.8.0 and below, when creating prompts, JSON requests are sent to define and modify the prompts via PATCH endpoint for prompt groups (/api/prompts/groups/:groupId). However, the request bodies are not sufficiently validated for proper input, enabling users to modify prompts in a way that was not intended as part of the front end system. The patchPromptGroup function passes req.body directly to updatePromptGroup() without filtering sensitive fields. This issue is fixed in version 0.8.1.
No. Junglewise Threat Intelligence has no report of CVE-2025-66451 being exploited in the wild.
How severe is CVE-2025-66451?
Medium severity, with a CVSS score of 6.5, published 11 December 2025.
Which products and versions are affected?
LibreChat. The advisory does not name versions.
Is there a fix for CVE-2025-66451?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-66451?
Check whether you run LibreChat. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.