CVE-2026-85990: Leantime: Any Authenticated User Can Self-Escalate to Admin via Unauthorized JSON-RPC Methods

Any authenticated Leantime user - including the lowest-privilege readonly role - can escalate to full administrative access by calling the JSON-RPC method leantime.rpc.api.api.createApiKeyWithProjects with an attacker-chosen role value. The server creates a new account at that role with no authorization check, and the resulting credentials work as a fully interactive admin login through the ordinary web UI. The same root cause (missing per-method authorization on JSON-RPC-exposed service methods) also leaves the Plugins service’s installPlugin, enablePlugin, disablePlugin, and removePlugin methods callable by any authenticated user with no role check, even though their web-UI equivalents correctly require an admin/owner role.