Vladimir Kolesnikov

Like any other software WordPress does have bugs and security vulnerabilities. They get fixed when the developers become aware of them. 
However, sometimes several WordPress releases are vulnerable. The problem is that the developers do not backport security updates to older WordPress releases. 
As a result, those who do not want to upgrade their WordPress installations (for example, because newer WP releases tend to consume more system resources and 
upgrade may result in having to use more expensive hosting) remain vulnerable.
ICS Security Fixes is the plugin for those who do not upgrade their WordPress: the plugin tries to fix known WordPress vulnerabilities 
at that remaining compatible with as many old WordPress releases as possible. 
And though it cannot fix all known vulnerabilities, it makes older WordPress installations more secure.
<h3>Warning</h3>
This plugins requires that PHP 5 be installed. PHP 4 is not supported.

ICS Security Fixes

The plugin tries to fix known WordPress vulnerabilities for older WordPress versions. Warning: For PHP 5 only.

Netsecop Inc.

Netsecop WordPress security plugin is the one-click solution to create your Netsecop.com account and start your security scans.
Netsecop WordPress plugin offers you the following features at no charge:
<ul>
<li>Web application vulnerability scanning</li>
<li>Remote malware scanning</li>
<li>Blacklist scanning</li>
<li>Instant notifications</li>
</ul>
This plugin shows the security summary of your website on the WordPress dashboard. In order to get more detailed information about your security problems, you can login Netsecop.com with your WordPress email address. You will get an email regarding to your Netsecop.com account once you activate the plugin.
IMPORTANT: Netsecop WordPress plugin relies on Netsecop.com servers in order to perform security scans and parse scan results. All related information will be securely transferred back and forth between Netsecop servers and the plugin. By activating the Netsecop WordPress Plugin, you agree to our <a href="https://www.netsecop.com/termsandconditions.html" rel="nofollow ugc">terms and conditions</a>.

Netsecop Web Application Vulnerability, Malware, and Blacklist Scanner

Netsecop is a cloud-based web application security scanner which scans your website against vulnerabilities and malware.

ICS Security Fixes vs Netsecop Web Application Vulnerability, Malware, and Blacklist Scanner