John Blackbourn

If you publish many password protected posts (or even if you don’t), you may end up using the same password for each one. With this plugin you can define a global password from your ‘Settings -> Global Post Password’ menu, and switch password protection on or off from the writing screen with just one click. Whenever you change the global password, all password protected posts are automatically updated with the new password.
Now whenever you write or edit a post or page you’ll be able to switch password protection on or off with one click, instead of having to manually type in a password each time. You can change the global password whenever you like from the ‘Settings -> Global Post Password’ menu.
Note that this plugin does not automatically enable password protection on every post. It allows you to use a global password for every post that you choose to password protect.
Please note that this plugin is no longer actively maintained. The global post password setting does not work with the block-based editor in WordPress and it’s unlikely that I’ll add support for it unless someone else volunteers to develop it. It does work with the “Classic” editor and with versions of WordPress prior to 5.0.

Global Post Password

Globally set a password for all password protected posts and pages.

Freemius

WP Chill

Silkalns

patrickposner

<h3>Password Protect Pages, Posts & Content in WordPress</h3>
Passster is an all-in-one plugin to password protect pages, content, or your entire site in seconds—quick, secure, and easy to use. 
Passster offers three protection modes to cover every use case you may think of when it comes to password protecting your WordPress website.
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<h3>Passster Pro – Even more protection features when making a purchase</h3>
Multiple Passwords & Password Lists 
– Assign multiple passwords for different users. 
– Create and manage large password lists for easy control.
Quick & Bulk Edit for Password Protection 
– Use WordPress Quick Edit and Bulk Edit to protect multiple pages instantly.
Unlock Content by User Role or Email 
– Automatically grant access to specific users or email addresses.
Password Expiration & Usage Limits 
– Set passwords to expire after a number of uses, first use, or by a time limit (hours, days, weeks). 
– Track which passwords were used and when they will expire.
Generate Unlock Links 
– Create encrypted unlock links so users can access content without entering a password. 
– Automatically shorten links with Bit.ly for easy sharing.
WooCommerce Protection & Sales 
– Protect WooCommerce pages, products, and checkout with a password. 
– Sell access to protected content—generate and email passwords automatically after purchase.
Detailed Password Usage Statistics 
– Track when and how often passwords are used. 
– View first usage date, IP (optional), and browser details.
<h3>Quick Comparison (Free vs. Pro)</h3>
<h3>Free Version:</h3>
✔ Protect sections of pages using shortcodes or blocks. 
✔ Secure entire pages and posts. 
✔ Automatically protect child pages with a single click. 
✔ Lock down your entire site with a password. 
✔ Unlock protected content without refreshing the page. 
✔ Customize the design, labels, and descriptions of the password form. 
✔ Use cookies to grant access across multiple protected areas.
<h3>Pro Version:</h3>
✔ Everything in the free version, plus: 
✔ Protect content with multiple passwords or password lists. 
✔ Quickly set up password protection via Quick Edit or Bulk Edit. 
✔ Protect content using Google reCAPTCHA or hCAPTCHA. 
✔ Unlock protected content by user role or email. 
✔ Set passwords to expire based on usage limits or time intervals. 
✔ Generate encrypted unlock links for seamless access. 
✔ Track and prevent concurrent password sharing. 
✔ Secure WooCommerce products and store pages. 
✔ Sell access to protected content via WooCommerce integration. 
✔ Detailed statistics on password usage and lists.
Get it now on <a href="https://passster.com/" rel="nofollow ugc">passster.com/</a>
<h3>Documentation</h3>
Learn more about this plugin <a href="https://passster.com/kb/" rel="nofollow ugc">in our official documentation</a>
<h3>Support</h3>
<ul>
<li>Free users: <a href="https://wordpress.org/support/plugin/content-protector/" rel="ugc">Ask in our forum</a></li>
<li>Pro users: <a href="https://passster.com/contact-us/?utm_source=wordpress.org&utm_medium=web&utm_campaign=description&utm_term=contact+us" rel="nofollow ugc">Get priority help</a></li>
</ul>

Passster – Password Protect Pages and Content


I'm not sure that updating the plugin is the only cause, but it is a cause of this problem: the correct password ceases to unlock the content after an update and says "security check failed" or something when attempting to authenticate.  This causes a periodic freak-out of my customer.  To fix it I have to add and take away the whole-page lock...I think...  It's hard to pinpoint what I actually do that makes it start working again.


Periodically doesn't unlock. Buggy

Password Protect Pages, Posts & Content in WordPress

Global Post Password vs Passster – Password Protect Pages and Content