HackTheBox Jet Fortress — Full 11-Flag Walkthrough (Web → Binary → Crypto)

Complete Jet Fortress writeup translated from the xchg2pwn Spanish original. 11 flags: HTML comment → reverse DNS → JS deobfuscation → SQL injection → preg_replace /e RCE → buffer overflow → XOR cryptanalysis → Elasticsearch enum → heap exploitation → RSA Wiener attack → final heap exploit chain.