CVE-2025-8943
CVE-2025-8943 · Unsupervised OS command execution leads to remote code execution by unauthenticated network attackers
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 9.8 · Critical · EPSS 75.2% · Public exploit
- Published
- Updated
Stack: node
Affected products and versions
flowise npm
- Affected ranges
- SEMVER: ≤ 3.0.5
No fix published