Critical · published August 14, 2025
CVSS calls it critical at 9.8. It sits in the 99.5th percentile for exploit probability.
🔥 When the gate is wide open, anyone can walk in and take over! Flowise's Custom MCPs feature is allowing unauthenticated attackers to execute OS commands without breaking a sweat! Think of it like a restaurant with an open kitchen where anyone can walk in and cook — no need for a reservation or a chef's hat! Without proper role-based access controls in place, it's dangerously easy for someone to manipulate the menu and dish out whatever they want. An attacker can execute any OS command on the server, potentially leading to total system compromise. This means they could access sensitive data, turn off security protocols, or even bring the whole server down. It's absolutely devastating if exploited!
Think of it like a restaurant with an open kitchen where anyone can walk in and cook — no need for a reservation or a chef's hat! Without proper role-based access controls in place, it's dangerously easy for someone to manipulate the menu and dish out whatever they want. The vulnerability in Flowise's Custom MCPs allows attackers to execute unsandboxed OS commands due to minimal authentication and authorization controls. In versions prior to 3.0.1, the default installation lacks any authentication setup, making it even riskier.
An attacker can execute any OS command on the server, potentially leading to total system compromise. This means they could access sensitive data, turn off security protocols, or even bring the whole server down. It's absolutely devastating if exploited! Upgrade to Flowise version 3.0.1 or later immediately to enforce proper authentication. Ensure role-based access controls (RBAC) are implemented to restrict command execution only to authorized users. Regularly review and tighten access permissions to enhance security. You've got this! With these steps, you'll transform into a security hero in no time! 🛡️