Client-side controls, such as JavaScript validation and CAPTCHA enforcement, are explicitly described in CEH v13 as inherently untrustworthy, since they run on the user’s device. The most effective way to bypass them is by intercepting and modifying HTTP requests after client-side validation but before server-side processing.
Using a proxy tool (such as Burp Suite) allows the tester to manipulate parameters invisibly, without disabling JavaScript or injecting code that could raise alarms. This makes Option B the most stealthy and effective method.
Disabling JavaScript (Option A) is noisy and easily detected. Injecting JavaScript (Option C) may trigger client-side protections. Reverse-engineering encryption (Option D) is complex and unnecessary.
CEH v13 emphasizes proxy-based manipulation as the preferred technique for bypassing client-side security mechanisms. Therefore, Option B is correct.
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