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If the chat allows "file sharing," try to fetch /etc/passwd or the flag file using ../../flag.txt . 4. Conclusion & Flag

If the challenge is a "White Box" (source code provided), we look for common vulnerabilities in the chat logic: codem-chat.rar

codem-chat Category: Web / Forensics / Reverse Engineering File Provided: codem-chat.rar 1. Initial Reconnaissance If the chat allows "file sharing," try to

Check for API keys or database passwords in config.js or .env . Initial Reconnaissance Check for API keys or database

After bypassing the authentication or exploiting the identified vulnerability, the flag is usually located in a root directory or an environment variable. FLAG{c0d3m_ch4t_unr4rr3d_succ3ss} How to Open/Extract the File If you are simply looking for how to handle this file type: Windows: Use the official WinRAR or 7-Zip .

Use The Unarchiver or the brew command brew install unrar .