CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2025-8943
Critical (9.8) in flowiseai flowise. EPSS 75% chance of exploitation in the next 30 days.
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.
Severity
- EPSS
- 75% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-306, CWE-862
- Published
- Modified
- Record from
- the NVD, synced
Affected
- flowiseai:flowise
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-2vv2-3x8x-4gv7 | npm | flowise | <=3.0.5 | no fix published |