PIAF-HMS multiple unauthenticated SQL injection vulnerabilities via mysql_query

claudiopizzillo PIAF-HMS (PBX-In-A-Flash Hotel Management System; no released versions, latest commit 389d2633441b65ced1c104212cd62be2bfca21e5) contains multiple unauthenticated SQL injection vulnerabilities. The application has no authentication mechanism and passes user-supplied HTTP parameters directly into deprecated mysql_query calls via string concatenation, without sanitization, escaping, or parameterization.