Flowise before 3.1.3 contains a sandbox escape vulnerability in the vm2 JavaScript sandbox that allows authenticated users to execute arbitrary code by exploiting moment locale validation bypass. Attackers can craft a fake String object with a match function that bypasses path traversal checks to load and execute malicious JavaScript files stored in the document store outside the sandbox.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 3
https://github.com/FlowiseAI/Flowise/commit/4211bfc8f15746be4019bba557e29a7ba83…
disclosure@vulncheck.com
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-rqh4-rxw3-93rp
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/flowise-before-sandbox-escape-to-rce
disclosure@vulncheck.com