CVE-2025-8943

Unsupervised OS command execution leads to remote code execution by unauthenticated network attackers

Description

The Custom MCPs feature is designed to execute OS commands, for instance, using tools like `npx` to spin up local MCP Servers. However, Flowise's inherent authentication and authorization model is minimal and lacks role-based access controls (RBAC). Furthermore, in Flowise versions before 3.0.1 the default installation operates without authentication unless explicitly configured. This combination allows unauthenticated network attackers to execute unsandboxed OS commands.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.05%
Third-Party Advisory jfrog.com
Published at:
Updated at:

References

Link Tags
https://research.jfrog.com/vulnerabilities/flowise-os-command-remote-code-execution-jfsa-2025-001380578/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2025-8943?
CVE-2025-8943 has been scored as a critical severity vulnerability.
How to fix CVE-2025-8943?
To fix CVE-2025-8943, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-8943 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-8943 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-8943?
CVE-2025-8943 affects .
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