If you paste the of the upload handler or a screenshot of the error message, I’ll write a specific, step-by-step exploit for that exact challenge.
If you share more details (screenshot, error message, source code snippet), I can tailor it exactly. Otherwise, here’s a for such a challenge: fileupload gunnerproject exclusive
Let me know if I can assist you more.
Upon success, you receive a string like: gunner://exclusive/f73a9c21e... . This is your permanent, non-deletable reference. I’ll write a specific