Ok so here is what I found



Authors website wireplastik.com (currently down)

php script I found exploit in wpquiz  version 2.60b8 ( also tested on 2.60b 1-7)



 



Exploit: by default wpquiz comes with a folder called extras. This folder is not password protected nor does it require any sort of authentication to gain entry.



 



The extras folder contains php version testing scripts, sql testing scripts, and most importantly adminrestore.php



So here is how the exploit works. 



Do a search on Google for wpquiz (you will find over 500 results)



Test to see if the site has the extras folder

example http://site-to-exploit.com/wpquiz/extras/adminrestore.php



If this page comes up the site is vulnerable



Now you must register an account on the site by simply registering

login once then log out

then go to http://sitetoexploit.com/wpquiz/extras/adminrestore.php



You can scroll down until you find your username and select it, then hit the button “Restore Admin Status”

You are now an ADMIN of the wpquiz php script 



you can now login and access the admin control panel; you will have complete control over the quiz at this point. You can also edit user’s accounts; change users email addresses then request a lost password. You then have that user’s password that could possibly lead to more problems such as logging into user’s email that was used to register with wpquiz and gain further access



Fix- delete the extras directory, password protect the extras directory or rename the extras folder



Please give me full credits for this exploit find. I have tried to contact the author but the site is down and has been for a while

The script seems to be unsupported at this point. 



Credits :



Jonathan Tough

Exploit found 7.28.04

email jtough@gmail.com

www.eyeimpressions.com