Horizon Alert
Summary of the vulnerability and why it matters
This advisory addresses a critical vulnerability in the n8n open-source workflow automation platform. An authenticated user with specific permissions could exploit a bypass of a previous security fix, potentially leading to remote code execution on the n8n host when combined with other workflow components. The primary concern is to confirm if this technology is in use and, if so, to understand the exposure.
- Authenticated users can execute arbitrary code.
- Automation platform central to business processes.
- Assess n8n usage and exposure risks.
Attack Path
How an attacker could exploit the issue
An attacker could exploit this vulnerability by first gaining authenticated access to n8n, a workflow automation platform. Once authenticated, they would need the ability to create or modify workflows. By manipulating the XML node within a workflow, particularly in conjunction with other nodes, the attacker could trigger the vulnerability, potentially leading to remote code execution on the n8n host.
- Requires authenticated user with workflow permissions.
- Triggered by modifying XML node in workflows.
- Risk of remote code execution.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability could allow an authenticated user to execute arbitrary code on the n8n host when specific workflow configurations are met. The system data and behavior of the n8n service itself may be affected.
- n8n host system data.
- Authenticated workflow modification.
- Remote code execution on host.
Operational Fix
Recommended remediation, mitigation, and detection steps
Application owners and platform teams are likely responsible for managing n8n instances, as it's an open-source workflow automation platform. The first practical step involves identifying all deployed n8n instances, assessing their reachability and business criticality, and then coordinating with the accountable owner to plan remediation, focusing on instances that are externally accessible or handle sensitive data.
- Ownership: Application or platform teams.
- Verify first: Instance reachability and criticality.
- Action: Plan and execute remediation.
