Weston Ruter

This plugin enforces a <a href="https://web.dev/articles/strict-csp" rel="nofollow ugc">Strict Content Security Policy</a> (CSP) on the frontend and login screen. This helps mitigate <a href="https://developer.mozilla.org/en-US/docs/Web/Security/Attacks/XSS" rel="nofollow ugc">cross-site scripting</a> (XSS) vulnerabilities. The policy cannot yet be applied to the WP Admin (see <a href="https://core.trac.wordpress.org/ticket/59446" rel="nofollow ugc">#59446</a>).
In <a href="https://core.trac.wordpress.org/ticket/58664" rel="nofollow ugc">#58664</a>, the manual construction of script tags was eliminated from <code>WP_Scripts</code> and inline scripts on frontend/login screen, thanks to the helper functions which had previously been introduced in <a href="https://core.trac.wordpress.org/ticket/39941" rel="nofollow ugc">#39941</a>. This made it possible to apply Strict CSP, as long as themes and plugins are not directly printing <code><script></code> tags. Some bundled WordPress core themes <a href="https://github.com/search?q=repo%3AWordPress%2Fwordpress-develop+path%3A%2F%5Esrc%5C%2Fwp-content%5C%2Fthemes%5C%2F%2F+%2F%3Cscript%5B%5E%3E%5D*%3E%2F&type=code" rel="nofollow ugc">still do this</a> incorrectly (which has been reported in Trac as <a href="https://core.trac.wordpress.org/ticket/63806" rel="nofollow ugc">#63806</a>). For example, do not do this:
<pre>function my_theme_supports_js() {
 echo '<script>document.body.classList.remove("no-js");</script>'; // ❌
}
add_action( 'wp_footer', 'my_theme_supports_js' );</pre>
Instead, do this:
<pre>function my_theme_supports_js() {
 wp_print_inline_script_tag( 'document.body.classList.remove("no-js");' ); // ✅
}
add_action( 'wp_footer', 'my_theme_supports_js' );</pre>
So in order for scripts to execute, they must be printed using the relevant APIs in WordPress for adding scripts, including <a href="https://developer.wordpress.org/reference/functions/wp_enqueue_script/" rel="nofollow ugc"><code>wp_enqueue_script()</code></a>, <a href="https://developer.wordpress.org/reference/functions/wp_add_inline_script/" rel="nofollow ugc"><code>wp_add_inline_script()</code></a>, <a href="https://developer.wordpress.org/reference/functions/wp_localize_script/" rel="nofollow ugc"><code>wp_localize_script()</code></a>, <a href="https://developer.wordpress.org/reference/functions/wp_print_script_tag/" rel="nofollow ugc"><code>wp_print_script_tag()</code></a>, <a href="https://developer.wordpress.org/reference/functions/wp_print_inline_script_tag/" rel="nofollow ugc"><code>wp_print_inline_script_tag()</code></a>, and <a href="https://developer.wordpress.org/reference/functions/wp_enqueue_script_module/" rel="nofollow ugc"><code>wp_enqueue_script_module()</code></a>. Otherwise, a script’s execution will be blocked and an error will appear in the console, for example:
<blockquote>
Refused to execute inline script because it violates the following Content Security Policy directive: “script-src ‘nonce-9b539cfe47’ ‘unsafe-inline’ ‘strict-dynamic’ https: http:”. Note that ‘unsafe-inline’ is ignored if either a hash or nonce value is present in the source list.
</blockquote>
This also blocks scripts inside of <a href="https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes#event_handler_attributes" rel="nofollow ugc">event handler attributes</a>, such as <code>onclick</code>, <code>onchange</code>, <code>onsubmit</code>, and <code>onload</code>. As noted on MDN:
<blockquote>
Warning: The use of event handler content attributes is discouraged. The mix of HTML and JavaScript often produces unmaintainable code, and the execution of event handler attributes may also be blocked by content security policies.
</blockquote>
This plugin also ensures that scripts added to the page from embeds (e.g. Tweets) also get the <code>nonce</code> attribute added.

Strict CSP

Enforces a Strict Content Security Policy on the frontend and login screen to help mitigate any XSS vulnerabilities.

Anti-Malware Admin

Features:
<ul>
<li>Download Definition Updates to protect against new threats.</li>
<li>Run a Complete Scan to automatically remove known security threats, backdoor scripts, and database injections.</li>
<li>Firewall block SoakSoak and other malware from exploiting Revolution Slider and other plugins with known vulnerabilites.</li>
<li>Upgrade vulnerable versions of timthumb scripts.</li>
</ul>
Premium Features:
<ul>
<li>Patch your wp-login and XMLRPC to block Brute-Force and DDoS attacks.</li>
<li>Check the integrity of your WordPress Core files.</li>
<li>Automatically download new Definition Updates when running a Complete Scan.</li>
</ul>
Register this plugin at <a href="http://gotmls.net/" rel="nofollow ugc">GOTMLS.NET</a> and get access to new definitions of “Known Threats” and added features like Automatic Removal, plus patches for specific security vulnerabilities like old versions of timthumb. Updated definition files can be downloaded automatically within the admin once your Key is registered. Otherwise, this plugin just scans for “Potential Threats” and leaves it up to you to identify and remove the malicious ones.
NOTICE: This plugin make call to GOTMLS.NET to check for updates not unlike what WordPress does when checking your plugins and themes for new versions. Staying up-to-date is an essential part of any security plugin and this plugin can let you know when there are new plugin and definition update available. If you’re allergic to “phone home” scripts then don’t use this plugin (or WordPress at all for that matter).
Special thanks to:
<ul>
<li>Clarus Dignus for design suggestions and graphic design work on the banner image.</li>
<li>Jelena Kovacevic and Andrew Kurtis of webhostinghub.com for providing the Spanish translation.</li>
<li>Marcelo Guernieri for the Brazilian Portuguese translation.</li>
<li>Umut Can Alparslan for the Turkish translation.</li>
<li><a href="https://profiles.wordpress.org/michacassola/" rel="nofollow ugc">Micha Cassola</a> for the German translation.</li>
<li><a href="https://profiles.wordpress.org/situstarget/" rel="nofollow ugc">Robi Erwin Setiawan</a> for the Indonesian translation.</li>
</ul>

Anti-Malware Security and Brute-Force Firewall

This Anti-Malware scanner searches for Malware, Viruses, and other security threats and vulnerabilities on your server and it helps you fix them.

Strict CSP vs Anti-Malware Security and Brute-Force Firewall