Horizon Alert
Summary of the vulnerability and why it matters
This advisory concerns a vulnerability in Flowise, a platform used for building AI applications, that could allow an attacker to execute malicious code remotely. The issue stems from a validation bypass in how server configurations are handled.
- Bypassed security check allows remote code execution.
- Matters if you use Flowise for AI application development.
- Confirm if your Flowise deployments are affected.
Attack Path
How an attacker could exploit the issue
An attacker with authenticated access could exploit this vulnerability by manipulating the `cwd` parameter within the MCP server configuration. This bypasses path validation, allowing the attacker to control the working directory and execute malicious code, potentially leading to remote code execution.
- Authenticated access is required.
- Bypass path validation via `cwd` parameter.
- Achieve remote code execution.
Live Threat
Current exploitation, exposure, and threat context
Attackers could execute arbitrary code on systems running Flowise when an authenticated user interacts with a specially crafted configuration. This occurs when path validation for the `cwd` parameter in MCP server configurations is bypassed, allowing the attacker to control the working directory and inject malicious commands. The risk is present when the MCP server configuration is exposed to an attacker.
- System configuration and code execution.
- Path validation bypass via clean filenames.
- Compromise of the underlying system.
Operational Fix
Recommended remediation, mitigation, and detection steps
Technical leaders and platform owners should prioritize identifying all Flowise deployments and assessing their business criticality and external reachability. Confirming the specific teams responsible for Flowise instances, such as application or infrastructure teams, is crucial for effective remediation planning.
- Application owners should manage the issue.
- Verify Flowise deployment reachability and criticality.
- Plan remediation based on identified risk.
