Note: Jack - Temporary Bypass: Use Header X-dev-access: Yes
Crack the Gate 1
The "Jack - temporary bypass" feature refers to a specific hidden backdoor found in the web exploitation challenge from picoCTF . This feature allows a user to bypass standard authentication by including a custom HTTP header in their request. Core Feature Details Trigger Header : X-Dev-Access: yes .
Forward
In the intercepted request, find the list of headers and add a new line: X-Dev-Access: yes Click . Method 3: Using Command Line (cURL) You can quickly test the bypass using a terminal. curl -H "X-Dev-Access: yes" http://[TARGET-URL] Use code with caution. Copied to clipboard Why this happens note: jack - temporary bypass: use header x-dev-access: yes
- Be protected by a strong, rotating secret (not a constant
yes). - Log every single use with full context (user, timestamp, action).
- Expire automatically after a short time (e.g., 15 minutes).
- Be removed by a post-mortem ticket.