WordPress Clean Up Optimizer 4.0.0 SQL Injection

WordPress Clean Up Optimizer plugin versions 4.0.0 and below suffer from a remote SQL injection vulnerability.

MD5 | 89af3a8114d77b162a390a6d6b1874e9

DefenseCode ThunderScan SAST Advisory: WordPress Clean Up Optimizer
Plugin Security Vulnerability

Advisory ID: DC-2017-12-004
Advisory Title: WordPress Clean Up Optimizer Plugin Security Vulnerability
Advisory URL: http://www.defensecode.com/advisories.php
Software: WordPress Clean Up Optimizer plugin
Language: PHP
Version: 4.0.0 and below
Vendor Status: Vendor contacted, update released
Release Date: 2017/12/13
Risk: High

1. General Overview
During the security audit of Clean Up Optimizer plugin for WordPress
CMS, security vulnerability was discovered using DefenseCode
ThunderScan application source code security analysis platform.

More information about ThunderScan is available at URL:

2. Software Overview
According to the plugin developers, Clean Up Optimizer is an optimizes
your WordPress as well as clean up the obsolete data from database.
You can schedule the process of Cleaning, Optimizing, Deleting and
Repairing the database tables without going to phpMyAdmin.


According to wordpress.org, it has more than 7,000 active installs.

3. Vulnerability Description
During the security analysis, ThunderScan discovered
SQL injection vulnerability in Clean Up Optimizer WordPress plugin.

The easiest way to reproduce the vulnerability is to visit the
provided URL while being logged in as administrator or another user
that is authorized to access the plugin settings page. Users that do
not have full administrative privileges could abuse the database
access the vulnerability provides to either escalate their privileges
or obtain and modify database contents they were not supposed to be
able to.

Due to the missing nonce token, the vulnerable code is also directly
exposed to attack vectors such as Cross Site request forgery (CSRF).

3.1 SQL injection
Function: $wpdb->get_results
Variable: $_REQUEST["table_name"]
Sample URL:
WHERE 123=123 AND 456=456-- DCDC
File: wp-clean-up-optimizer\includes\queries.php
587 $table_name_database = isset($_REQUEST["table_name"]) ?
esc_attr($_REQUEST["table_name"]) : "";
594 "SELECT * FROM $table_name_database"
598 "SHOW columns FROM $table_name_database"

4. Solution
After the vulnerability was reported the vendor resolved the security
issues. All users are strongly advised to update WordPress Clean Up
Optimizer plugin to the latest available version.

5. Credits
Discovered by Neven Biruski using DefenseCode ThunderScan source code
security analyzer.

6. Disclosure Timeline
2017/04/04 Vendor contacted
2017/04/10 Vendor responded
2017/04/10 Update released
2017/12/13 Advisory released to the public

7. About DefenseCode
DefenseCode L.L.C. delivers products and services designed to analyze
and test web, desktop and mobile applications for security

DefenseCode ThunderScan is a SAST (Static Application Security
Testing, WhiteBox Testing) solution for performing extensive security
audits of application source code. ThunderScan SAST performs fast and
accurate analyses of large and complex source code projects delivering
precise results and low false positive rate.

DefenseCode WebScanner is a DAST (Dynamic Application Security
Testing, BlackBox Testing) solution for comprehensive security audits
of active web applications. WebScanner will test a website's security
by carrying out a large number of attacks using the most advanced
techniques, just as a real attacker would.

Subscribe for free software trial on our website
http://www.defensecode.com/ .

E-mail: defensecode[at]defensecode.com

Website: http://www.defensecode.com
Twitter: https://twitter.com/DefenseCode/

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