Overview
Command Injection Filter Bypass focuses on a command-backed web feature that attempts to block dangerous input with an incomplete filter.
This lab highlights why blacklist-style filtering is fragile. If a feature still builds operating system commands from user input, small differences in syntax, encoding, or shell behavior can leave the application exposed.
Security Impact
Weak filtering around command execution can create a false sense of safety. Attackers may still influence the command line, access server-side data, or pivot from a simple utility feature into broader system compromise.
Vulnerability Scope
This kind of bypass appears when a fix blocks a few characters or keywords but still leaves shell interpretation, mixed arguments, or broad input formats in place.
Lab Focus
The lab focuses on evaluating filter-based defenses and seeing why robust command execution should avoid shell parsing of untrusted input altogether.
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