Horizon Alert
Summary of the vulnerability and why it matters
This advisory details a critical vulnerability in Flowise, a platform for building AI applications. The issue allows authenticated users to potentially execute malicious code by bypassing security measures within a JavaScript sandbox. This could enable unauthorized access and control over the platform and its connected systems.
- Allows code execution via sandbox bypass.
- Matters for maintaining platform integrity.
- Confirm relevance and potential exposure.
Attack Path
How an attacker could exploit the issue
An authenticated user can exploit a vulnerability in the vm2 JavaScript sandbox by crafting a malicious String object. This object can bypass path traversal defenses, allowing the attacker to load and execute arbitrary JavaScript code from the document store, effectively escaping the sandbox.
- Authenticated access required.
- Bypasses sandbox path traversal checks.
- Leads to arbitrary code execution.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability could allow an authenticated user to execute arbitrary code outside of the intended sandbox environment, potentially impacting the integrity and availability of the affected system. The exploit involves bypassing security checks to load and run malicious JavaScript files.
- System integrity and availability.
- Authenticated user can bypass sandbox controls.
- Arbitrary code execution in the document store.
Operational Fix
Recommended remediation, mitigation, and detection steps
The vulnerability in Flowise affects authenticated users and allows for arbitrary code execution, indicating that application owners and platform teams responsible for the Flowise deployment should take the lead. The immediate practical step is to identify all Flowise instances, determine their exposure and criticality, and then engage with vendor management if a patched version is available or plan necessary remediation based on assessed risk.
- Application owners should lead remediation efforts.
- Verify external reachability and asset criticality.
- Coordinate with vendor management for updates.
