Plesk Obsidian 18.0.77 Is Here: Significant Accessibility Developments and New ACME SSL Support

We are excited to announce the latest release of Plesk Obsidian: v18.0.77.

This update brings one of the most significant accessibility improvements in recent Plesk history, introduces native ACME protocol support with the new ACME SSL extension, adds support for the GoAccess web statistics tool, and delivers a wide range of fixes, platform updates, and security improvements across Linux and Windows.

A Major Step Forward in Accessibility 

Over the past year, we have completed a large-scale update of the Plesk interface with a strong focus on accessibility. 

With this release, Plesk moves significantly closer to meeting the expectations of the European Accessibility Act (EAA) and the WCAG 2.1 guidelines, helping partners and customers prepare for upcoming accessibility requirements while also improving the overall user experience. 

What Changed? 

We updated around 200 of the most frequently used pages across the Plesk interface and its most popular extensions. 

Key accessibility improvements include: 

• Improved compatibility with screen readers, including VoiceOver 

• Better keyboard navigation across interactive elements 

• Clear and consistent focus indicators 

• Support for interface scaling up to 200% 

• Improved accessibility behavior throughout the most commonly used workflows 

These improvements reflect our continued commitment to usability, compliance readiness, and platform stability. Accessibility is more than just compliance; it’s about creating a better experience for everyone. Our users who rely on assistive technologies such as screen readers or keyboard-only navigation can now use Plesk more reliably and independently.  

Introducing GoAccess Support for Linux 

Support has been introduced for GoAccess, a modern open source web log analyzer and interactive viewer. 

Available for Plesk for Linux (except CentOS 7 and CloudLinux 7), GoAccess delivers fast, actionable HTTP statistics and visual server reports. 

With GoAccess, users can: 

• Monitor website traffic in real time 

• Detect anomalies more easily 

• Troubleshoot issues faster 

• Access interactive and visually rich reporting 

Read more on the update and the upcoming changes to web statistics in Plesk. 

New ACME SSL Extension 

This release also introduces ACME SSL, a new extension that adds native ACME protocol support to Plesk. The extension integrates with SSL It! and enables issuing both wildcard and non-wildcard SSL/TLS certificates. 

ACME SSL: 

• Works with any ACME-compatible Certificate Authority 

• Supports both HTTP-01 and DNS-01 challenge types 

• Supports External Account Binding (EAB) 

• Can automatically attempt certificate renewals before expiration 

This gives users greater flexibility in certificate management while simplifying automated SSL/TLS deployment workflows. 

Feature Improvements 

v18.0.77 also includes several highly requested usability and platform improvements. 

SSL It! No Longer Requires an Email Address 

Plesk no longer requires users to provide an email address when requesting SSL/TLS certificates from Let’s Encrypt via the SSL It! extension. 

Expanded TuxCare Support 

The TuxCare Extended Lifecycle Support for PHP extension now supports: 

• Debian 13 

• AlmaLinux 10 

Built-in Code Editor Changes Rolled Back 

Based on customer feedback, we rolled back recent changes to the built-in Code Editor. 

The editor will: 

• No longer open in a separate drawer 

• Support tabs again 

Thank you to everyone who submitted feedback and helped us improve the editing experience. We are always happy to hear from you! Feel free to share your ideas and suggestions with us at features.plesk.com. 

Deprecated and Removed Items 

APS Catalog Removed 

The APS Catalog has been deprecated and removed from all Plesk Obsidian versions. 

Applications already installed from the APS Catalog will continue working. However, Plesk will no longer provide support for APS applications. 

ngx_pagespeed.so Deprecation 

Starting with Plesk Obsidian v18.0.78, support for the ngx_pagespeed.so module is deprecated and will be removed from the sw-nginx package.

Important Fixes and Stability Improvements 

v18.0.77 includes a large number of fixes across backup management, mail handling, extensions, Joomla! Toolkit, Route 53 integration, and more. 

Highlights include: 

• Fixed an issue where restoring password-protected scheduled backups stored in AWS S3 on another Plesk server did not display the password entry field 

• Resolved an issue where creating backups containing MySQL databases could fail when skip-name-resolve=1 was enabled 

• Addressed an issue where Plesk continued fetching APS application information after APS Catalog support had been disabled 

• Fixed mailbox synchronization issue where changing customer account passwords could unintentionally change mailbox passwords when the mailbox was hosted on the same server 

On Plesk for Linux, improvements include: 

• Improved web statistics calculation and reporting reliability 

• Fixed mailbox disk usage calculation issues when moving emails between folders 

• Improved Joomla! Toolkit website discovery and version reporting 

• Resolved Route 53 authorization and synchronization issues 

On Plesk for Windows, improvements include: 

• Updated endpoints for downloading Advanced ModSecurity Rules for IIS 

• Improved ASP.NET event handler execution reliability 

• A critical security fix was implemented. We strongly recommend installing this update as soon as possible 

Visit the changelog to view the full details of all Linux and Windows specific fixes, along with the latest updates. 

Updated Third-Party Components 

This release updates numerous third-party components and dependencies across Linux and Windows environments. 

Linux Updates 

• Roundcube updated to 1.6.14 

• sw-engine PHP updated to 8.4.19 

• OWASP ModSecurity CRS updated to 4.24.1 

• PostgreSQL client library updated to 18.3 

• libcurl updated to 8.19.0 

Windows Updates 

• Node.js updated to versions 24.14.1, 22.22.2, and 20.20.2 

• .NET updated to versions 10.0.4, 9.0.14, and 8.0.25 

• plesk-engine PHP updated to 8.4.19 

• Git for Windows updated to 2.53.0.2 

• MailEnable Standard updated to 10.55  

Update Recommended 

This release is a major development in making Plesk more accessible, modern, and secure, while also improving day-to-day usability for administrators, developers, and hosting providers. We especially encourage Windows users to install this update as soon as possible due to the included critical security fix.  

Plesk Obsidian v18.0.77 is available through the Plesk Installer. Unsure of how to update? Check out this guide. We recommend continuously updating your servers to the latest release to ensure platform security, usability, and stability.   

Thank you for your continued feedback and support. To learn more about this release and review the complete changelog, visit the release notes.