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Debugging Endpoints Nobody Bothers to Test Leads to Some Crits

0xsponge Published on 0xsponge.medium.com Published 23 Sep 2026
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By 0xsponge. Read the original on Medium.

Most people's eyes slide straight past /cookie-policy/ on the way to the login flow, the file upload, the payment endpoint. This is about opening the debugger on that page anyway, out of stubbornness, and stepping through it one line at a time until the assumption it was opened with falls apart. It ends in a critical.

The reusable part is the method rather than the bug: rendering localised content is a solved problem, and a team that solved it their own way instead is worth reading closely.