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Q: What is GPC, and how can it be bypassed?

A: GPC is an acronym for GET, POST, and COOKIE, which are the three primary HTTP methods used to submit data. Bypassing GPC refers to evading a security filter that is checking these three data sources.

Common bypass techniques include:

  • URL Rewriting: Modifying URLs to obscure parameters.
  • Using XMLHttpRequest (XHR): Sending POST requests asynchronously without a full page reload, bypassing URL-based filtering.