Vikunja has a Rate-Limit Bypass for Unauthenticated Users via Spoofed Headers

Summary Unauthenticated users are able to bypass the application's built-in rate-limits by spoofing the X-Forwarded-For or X-Real-IP headers due to the rate-limit relying on the value of echo.Context.RealIP. Details In the first file below, the rate-limit for unauthenticated users can be observed...