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.

softaculous

pagelayer

loginizer

Loginizer is a WordPress plugin which helps you fight against bruteforce attack by blocking login for the IP after it reaches maximum retries allowed. You can blacklist or whitelist IPs for login using Loginizer. You can use various other features like Two Factor Auth, reCAPTCHA, PasswordLess Login, etc. to improve security of your website.
Loginizer is actively used by more than 1000000+ WordPress websites.
You can find our official documentation at <a href="https://loginizer.com/docs" rel="nofollow ugc">https://loginizer.com/docs</a>. We are also active in our community support forums on <a href="https://wordpress.org/support/plugin/loginizer" rel="ugc">wordpress.org</a> if you are one of our free users. Our Premium Support Ticket System is at <a href="https://loginizer.deskuss.com" rel="nofollow ugc">https://loginizer.deskuss.com</a>
Free Features :
<ul>
<li>Brute force protection. IPs trying to brute force your website will be blocked for 15 minutes after 3 failed login attempts. After multiple lockouts the IP is blocked for 24 hours. This is the default configuration and can be changed from Loginizer -> Brute force page in WordPress admin panel.</li>
<li>Failed login attempts logs.</li>
<li>Blacklist IPs</li>
<li>Whitelist IPs</li>
<li>Custom error messages on failed login.</li>
<li>Permission check for important files and folders.</li>
<li>Allow only Trusted IP.</li>
<li>Blocked Screen in place of the Login page.</li>
<li>Email Notification on successful login.</li>
<li>Let users login with LinkedIn</li>
</ul>
<h4>Get Support and Pro Features</h4>
Get professional support from our experts and pro features to take your site’s security to the next level with <a href="https://loginizer.com/pricing" rel="nofollow ugc">Loginizer-Security</a>.
Pro Features :
<ul>
<li>MD5 Checksum – of Core WordPress Files. The admin can check and ignore files as well.</li>
<li>PasswordLess Login – At the time of Login, the username / email address will be asked and an email will be sent to the email address of that account with a temporary link to login.</li>
<li>Two Factor Auth via Email – On login, an email will be sent to the email address of that account with a temporary 6 digit code to complete the login.</li>
<li>Two Factor Auth via App – The user can configure the account with a 2FA App like Google Authenticator, Authy, etc.</li>
<li>Login Challenge Question – The user can setup a Challenge Question and Answer as an additional security layer. After Login, the user will need to answer the question to complete the login.</li>
<li>reCAPTCHA – Google’s reCAPTCHA v3/v2, Cloudflare Turnstile, hCAPTCHA can be configured for the Login screen, Comments Section, Registration Form, etc. to prevent automated brute force attacks. Supports WooCommerce as well.</li>
<li>Rename Login Page – The Admin can rename the login URL (slug) to something different from wp-login.php to prevent automated brute force attacks.</li>
<li>Rename WP-Admin URL – The Admin area in WordPress is accessed via wp-admin. With loginizer you can change it to anything e.g. site-admin</li>
<li>CSRF Protection – This helps in preventing CSRF attacks as it updates the admin URL with a session string which makes it difficult and nearly impossible for the attacker to predict the URL.</li>
<li>Rename Login with Secrecy – If set, then all Login URL’s will still point to wp-login.php and users will have to access the New Login Slug by typing it in the browser.</li>
<li>Disable XML-RPC – An option to simply disable XML-RPC in WordPress. Most of the WordPress users don’t need XML-RPC and can disable it to prevent automated brute force attacks.</li>
<li>Rename XML-RPC – The Admin can rename the XML-RPC to something different from xmlrpc.php to prevent automated brute force attacks.</li>
<li>Username Auto Blacklist – Attackers generally use common usernames like admin, administrator, or variations of your domain name / business name. You can specify such username here and Loginizer will auto-blacklist the IP Address(s) of clients who try to use such username(s).</li>
<li>New Registration Domain Blacklist – If you would like to ban new registrations from a particular domain, you can use this utility to do so.</li>
<li>Change the Admin Username – The Admin can rename the admin username to something more difficult.</li>
<li>Auto Blacklist IPs – IPs will be auto blacklisted, if certain usernames saved by the Admin are used to login by malicious bots / users.</li>
<li>Disable Pingbacks – Simple way to disable PingBacks.</li>
<li>SSO – Single Sign-on, let any user access to your WordPress Dashboard without the need to share username or password.</li>
<li>Limit Concurrent Logins – It prevents user to login from different devices concurrently, you can define how many devices you want to allow, and how you want to restrict the user when concurrent limit is reached.</li>
<li>Social Login – Users can login or register with their Google, Github, Facebook, X (Twitter), Discord, Twitch, LinkedIn, Microsoft with support for WooCommerce and Ultimate Member.</li>
<li>Key Less Social Login – Use Loginizer’s Social Auth for easy key less Social login configuration, now supports Google, GitHub, X, LinkedIn more to be added later</li>
</ul>
Features in Loginizer include:
<ul>
<li>Blocks IP after maximum retries allowed</li>
<li>Extended Lockout after maximum lockouts allowed</li>
<li>Email notification to admin after max lockouts</li>
<li>Blacklist IP/IP range</li>
<li>Whitelist IP/IP range</li>
<li>Check logs of failed attempts</li>
<li>Create IP ranges</li>
<li>Delete IP ranges</li>
<li>Licensed under LGPLv2.1</li>
<li>Safe & Secure</li>
</ul>

Loginizer

Loginizer is a WordPress security plugin which helps you fight against bruteforce attacks.

Strict CSP vs Loginizer