The vulnerability manifests in the designer page's connection handling functionality. The description explicitly mentions unauthorized SSRF through intranet port detection, which typically occurs when: 1) User-controlled input (host/port) is used to initiate network connections 2) No authentication checks protect the endpoint 3) No allowlist validation restricts target destinations. The database connection failure response pattern mentioned in the GitHub issue suggests the vulnerable function is related to database connection testing features in the designer interface. While exact method names aren't provided, UReport's architecture would logically place this functionality in the DesignerController class handling designer page requests.