vulnerability / NVI-00018401 / Revision 1
FlowiseAI has Mass Assignment in Tool Update Endpoint that Allows Cross-Workspace Resource Reassignment
GitHub lists this reviewed advisory for flowise. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
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01 / Meaning
Why it matters
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02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
flowise
source listed<= 3.1.1
### Summary A Mass Assignment vulnerability exists in the tool update endpoint of FlowiseAI. The endpoint allows authenticated users to modify server-controlled properties such as workspaceId, createdDate, and updatedDate when updating a tool resource. Due to missing server-side validation and authorization checks, an attacker can manipulate the workspaceId field and reassign tools to arbitrary workspaces. This breaks tenant isolation in multi-workspace environments. ### Details The endpoint responsible for updating tools: **PUT /api/v1/tools/{toolId}** accepts a JSON request body containing tool metadata. However, the server does not restrict which properties may be modified by the client. As a result, user-controlled request bodies can include additional fields that should normally be controlled only by the backend. Server-controlled fields that can be manipulated include: 1. workspaceId 2. createdDate 3. updatedDate The request body is directly merged into the underlying database entity without proper DTO validation or authorization checks. ### PoC Authenticate to the Flowise interface. Capture the request used to update a tool: ```http PUT /api/v1/tools/ Co
03 / Response
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04 / Limits
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05 / Provenance
Sources you can inspect
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- GHSA-x5v6-pj28-cwwm ↗
GitHub Advisory Database · vendor advisory
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Public revision history
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- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.