The vulnerability manifests in the pipeline interaction endpoint (/api/pipelines/{pipeline_id}/interaction/{path}). The PoC shows path traversal via URL-encoded '../' sequences in the interaction path parameter. This suggests the handler function processing this endpoint likely: 1. Accepts user-controlled path input 2. Fails to properly sanitize path traversal sequences 3. Uses this input to construct filesystem paths. In Python web frameworks, this would typically map to a GET handler method in a route controller. The medium confidence reflects the lack of direct code evidence, but the endpoint structure and vulnerability pattern strongly indicate the interaction handler's path parameter processing is flawed.