Use The Unarchiver or the brew command brew install unrar .
If the challenge is a "White Box" (source code provided), we look for common vulnerabilities in the chat logic: codem-chat.rar
Install the unrar utility via sudo apt install unrar and use unrar x codem-chat.rar . Use The Unarchiver or the brew command brew install unrar
Examine the "private chat" feature. Can a user view messages from a room they aren't invited to by manipulating the roomID ? 3. Exploitation Path Can a user view messages from a room
Look for how the application handles incoming messages. Is there a lack of sanitization that could lead to XSS (Cross-Site Scripting)?
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 .
Check for API keys or database passwords in config.js or .env .
