1. A system for monitoring and mitigating client-side exploitation of application flaws, the system comprising: a server to operate a first application, the first application to communicate with a client device operating a second application to execute an application flaw script and the application flaw script to cause the client device to produce a first request associated with vulnerability of the first application; an application flaw service module communicatively coupled to the server, the application flaw service module to: receive the first request from the client device comprising transactional metadata based on the application flaw script; and inspect the transactional metadata in a header of the first request for malicious content within the first request by using a header and location inspection module that refers to a filter rules and logic database, wherein prior to the application flaw service module receiving and inspecting the transactional metadata within the first request, the server causes the application flaw script to be added to the transactional metadata of a response to a second request sent by the client device; and a vulnerability tracking module that tracks attack vectors in the received requests that are detected by the header and location inspection module.