A client side enforcement of server side security vulnerability exists in rails < 5.2.4.2 and rails < 6.0.3.1 ActiveStorage's S3 adapter that allows the Content-Length of a direct file upload to be modified by an end user bypassing upload limits.
Client-side enforcement of server-side security issue exists in wivia 5 all versions. If exploited, an unauthenticated attacker may bypass authentication and operate the affected device as the moderator user.