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Authorizer
Authorizer limits login attempts, restricts access to specific users, and authenticates against external sources (OAuth2, Google, LDAP, or CAS).
The facts
- Rating
- 5★ from 20
- Active installs
- 5k+
- Price
- Free
- Last updated
- 24 Aug 2026
- Added
- Apr 2015
- Requires WP
- 5.9
- Tested up to
- WP 7.1
- Requires PHP
- 8.1
- Downloads
- 203,831
Our analysis
AI-assistedAuthorizer is a WordPress plugin designed to restrict access to your site for specific users, making it suitable for environments like university courses. It replaces the default WordPress login system with options for external authentication via services such as Google, CAS, LDAP, or OAuth2 providers.
The plugin allows you to maintain a list of approved users and limit invalid login attempts to enhance security. It includes features for managing login access and view access, providing flexibility in how users interact with your site.
Best for: This plugin is best for educational institutions or sites requiring controlled user access.
What it does well
- ✓Restricts access to specific users
- ✓Supports multiple authentication methods including Google and LDAP
- ✓Limits invalid login attempts to enhance security
- ✓Includes a shortcode for embedding login forms
Where it falls short
- •Requires specific server setups like CAS or LDAP
- •Limited information on additional features or support
Verdict
Authorizer offers a focused solution for managing user access on WordPress sites, particularly in educational settings. Its reliance on external authentication methods may require additional server configuration.
From the developer
Paul Ryan's own description of Authorizer, lightly tidied.
Authorizer restricts access to a WordPress site to specific users, typically students enrolled in a university course. It maintains a list of approved users that you can edit to determine who has access. It also replaces the default WordPress login/authorization system with one relying on an external server, such as Google, CAS, LDAP, or an OAuth2 provider. Finally, Authorizer lets you limit invalid login attempts to prevent bots from compromising your users’ accounts.
View or contribute to the plugin source on GitHub: https://github.com/uhm-coe/authorizer
Authorizer requires the following:
- CAS server (2.x, 3.x, 4.x, 5.x, 6.x, or 7.x) or LDAP server (plugin needs the URL)
- PHP extensions: php-ldap, php-curl, php-dom
Authorizer provides the following options:
- Authentication: WordPress accounts; Google accounts; CAS accounts; LDAP accounts; OAuth2 accounts
- Login Access: All authenticated users (all local and all external can log in); Only specific users (all local and approved external users can log in)
- View Access: Everyone (open access); Only logged in users
- Limit Login Attempts: Progressively increase the amount of time required between invalid login attempts.
- Shortcode: Use the
[authorizer_login_form]shortcode to embed a wp_login_form() outside of wp-login.php.
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