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CVE-2025-66201

Librechat server-side request forgery (SSRF)

8.1 HIGHPublic exploitEPSS 0.29%
  1. Published29 Nov 2025

Description

LibreChat is a ChatGPT clone with additional features. Prior to version 0.8.1-rc2, LibreChat is vulnerable to Server-side Request Forgery (SSRF), by passing specially crafted OpenAPI specs to its "Actions" feature and making the LLM use those actions. It could be used by an authenticated user with access to this feature to access URLs only accessible to the LibreChat server (such as cloud metadata services, through which impersonation of the server might be possible). This issue has been patched in version 0.8.1-rc2.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected products

Librechat< 0.8.1 · 0.8.1

Remediation

Fixed in
Librechat≥ 0.8.1

References

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Frequently asked

Is CVE-2025-66201 being actively exploited?

CVE-2025-66201 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.29%.

How severe is CVE-2025-66201?

CVE-2025-66201 has a CVSS 3.1 base score of 8.1, rated high. EPSS estimates a 0.29% probability of exploitation.

Which products are affected by CVE-2025-66201?

Affected products include Librechat.

How do I fix CVE-2025-66201?

Upgrade affected software to a fixed version, for example Librechat 0.8.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-66201 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.