June was an exciting month for WordPress! Major changes are coming to the Gutenberg plugin, and WordCamp Europe brought the WordPress community closer together. Read on to learn more and to get all the latest updates.
WordPress 5.4.2 released
We said hello to WordPress 5.4.2 on June 10. This security and maintenance release features 17 fixes and 4 enhancements, so we recommend that you update your sites immediately. To download WordPress 5.4.2, visit your Dashboard, click on Updates, then Update Now, or download the latest version directly from WordPress.org. For more information, visit this post, review the full list of changes on Trac, or check out the HelpHub documentation page for version 5.4.2. WordPress 5.4.2 is a short-cycle maintenance release. The next major release will be version 5.5, planned for August 2020.
The core team launched Gutenberg 8.3 and 8.4 this month, paving the way for some exciting block editor features. Version 8.3 introduced enhancements like a reorganized, more intuitive set of block categories, a parent block selector, an experimental spacing control, and user-controlled link color options. Version 8.4 comes with new image-editing tools and the ability to edit options for multiple blocks. The block directory search feature that was previously available as an experimental feature, is now enabled for all Gutenberg installations. For full details on the latest versions on these Gutenberg releases, visit these posts about 8.3 and 8.4.
WordPress Bumps Minimum Recommended PHP Version to 7.2
In a major update, WordPress has bumped the minimum PHP recommendation to 7.2. The ServeHappy API has been updated to set the minimum acceptable PHP version to 7.2, while the WordPress downloads page recommends 7.3 or newer. Previously, the ServeHappy dashboard widget was showing the upgrade notice to users of PHP 5.6 or lower. This decision comes after discussions with the core Site Health team and the Hosting team, both of which recommended that the upgrade notice be shown to users of PHP <=7.1.
WordCamp Europe 2020 Moved Online
Following the success of a remote WordCamp Spain, WordCamp Europe was held fully online from June 4 to 6. The event drew a record 8,600 signups from people based in 138 countries, along with 2,500 signups for contributor day. WCEU Online also showcased 33 speakers and 40 sponsors, in addition to a Q&A with Matt Mullenweg. You can find the videos of the event in WordPress.tv by following this link, or you can catch the live stream recording of the entire event from the WP Europe YouTube Channel.
Josepha Haden (@chanthaboune), the executive director of the WordPress project, published a post that highlights resources on how the global WordPress community can focus on equity to help dismantle racial, societal, and systemic injustice.
PHP, the primary programming language in which WordPress is written, celebrated its 25th anniversary this month!
The Community team is updating the WordCamp code of conduct to address discrimination based on age, caste, social class, and other identifying characteristics.
The Documentation team is working on an external linking policy and has started a discussion on how to allow linking to trusted sources to benefit users.
WordCamp Denver was held online May 26–27. The event sold over 2,400 tickets and featured 27 speakers and 20 sponsors. You can catch the recorded live stream on the event site.
This security and maintenance release features 23 fixes and enhancements. Plus, it adds a number of security fixes—see the list below.
These bugs affect WordPress versions 5.4.1 and earlier; version 5.4.2 fixes them, so you’ll want to upgrade.
If you haven’t yet updated to 5.4, there are also updated versions of 5.3 and earlier that fix the bugs for you.
Security Updates
WordPress versions 5.4 and earlier are affected by the following bugs, which are fixed in version 5.4.2. If you haven’t yet updated to 5.4, there are also updated versions of 5.3 and earlier that fix the security issues.
Props to Sam Thomas (jazzy2fives) for finding an XSS issue where authenticated users with low privileges are able to add JavaScript to posts in the block editor.
Props to Luigi – (gubello.me) for discovering an XSS issue where authenticated users with upload permissions are able to add JavaScript to media files.
Props to Ben Bidner of the WordPress Security Team for finding an open redirect issue in wp_validate_redirect().
Props to Nrimo Ing Pandum for finding an authenticated XSS issue via theme uploads.
Props to Simon Scannell of RIPS Technologies for finding an issue where set-screen-option can be misused by plugins leading to privilege escalation.
Props to Carolina Nymark for discovering an issue where comments from password-protected posts and pages could be displayed under certain conditions.
Thank you to all of the reporters for privately disclosing the vulnerabilities. This gave the security team time to fix the vulnerabilities before WordPress sites could be attacked.
One maintenance update was also deployed to versions 5.1, 5.2 and 5.3. See the related developer note for more information.
Over the past week, I’ve been thinking a lot about George Floyd, Breonna Taylor, and Ahmaud Arbery. I have been thinking about white supremacy, the injustice that Black women and men are standing up against across the world, and all the injustices I can’t know, and don’t see.
The WordPress mission is to democratize publishing, and to me, that has always meant more than the freedom to express yourself. Democratizing publishing means giving voices to the voiceless and amplifying those speaking out against injustice. It means learning things that we otherwise wouldn’t. To me, it means that every voice has the ability to be heard, regardless of race, wealth, power, and opportunity. WordPress is a portal to commerce; it is a canvas for identity, and a catalyst for change.
While WordPress as an open source project may not be capable of refactoring unjust judicial systems or overwriting structural inequality, this does not mean that we, the WordPress community, are powerless. WordPress can’t dismantle white supremacy, but the WordPress community can invest in underrepresented groups (whose experiences cannot be substituted for) and hire them equitably. WordPress can’t eradicate prejudice, but the WordPress community can hold space for marginalized voices in our community.
There is a lot of racial, societal, and systemic injustice to fight. At times, change may seem impossible, and certainly, it’s been too slow. But I know in my heart that the WordPress community is capable of changing the world.
If you would like to learn more about how to make a difference in your own community, here are a few resources I’ve gathered from WordPressers just like you.
May was an action-packed month for WordPress! WordPress organizers are increasingly moving WordCamps online, and contributors are taking big steps towards Full Site Editing with Gutenberg. To learn more and get all the latest updates, read on.
Gutenberg 8.1 and 8.2
Gutenberg 8.1 was released on May 13, followed quickly by Gutenberg 8.2 on May 27.
8.1 added new block pattern features making it easier to insert desired patterns, along with a new pattern. It also added a button to collapsed block actions for copying the selected block, which will help touchscreen users or users who don’t use keyboard shortcuts.
8.2 introduced block pattern categories and a `viewportWidth` property that will be particularly useful for large block patterns. There is also a new content alignment feature, and enhancements to improve the writing experience.
Both releases include a number of new APIs, enhancements, bug fixes, experiments, new documentation, improvement to code quality, and more! To learn the latest, visit the announcement posts for Gutenberg 8.1 and Gutenberg 8.2.
Gutenberg Phase 2: Steps Towards Full Site Editing
Contributors are currently working hard on Phase 2 of Gutenberg! Where Phase 1 introduced the new block editor with WordPress 5.0, Phase 2 sees more customization and includes one of the biggest Gutenberg projects: Full Site Editing (FSE). At the moment, work on WordPress 5.5 has been initiated and contributors decided to include basic functionality for Full Site Editing in this release. FSE hopes to streamline the site creation and building process in WordPress using a block-based approach. There’s a lot of conversation and new information about FSE, so communication around the project is very important. On May 28th, a conversation was held in the #core-customize channel to discuss FSE and the future of the Customizer. To help everyone track the latest information, this post summarizes ways to keep up with FSE.
Representatives of the Themes Review Team have decided to update their team name to “Themes Team.” This decision reflects changes that the block editor brings to the landscape of themes with the Full Site Editing project. The team has always been involved in projects beyond reviewing WordPress.org themes and lately, the team has been contributing more to themes in general — including open-source packages, contributions to Full Site Editing, the Twenty Twenty theme, and more. You can read more about the name change in the team’s meeting notes.
On May 13th, BuddyPress 6.0.0, known as “iovine’s,” was released. This release includes two new blocks for the WordPress Editor: Members and Groups. It also saw the completion of the BP REST API, adding the six remaining endpoints, and the move or local avatar management to the Members component. Beyond that, 6.0.0 includes more than 80 changes, made possible by 42 contributors.
WordPress Meetup organizers in Spain joined hands to organize WordCamp Spain online from May 6 to 9, which proved to be a huge success. The event had more than 5,500 attendees, 60 speakers, and 16 sponsors. Over 200 people from around the world participated in the Contributor Day. Matt Mullenweg hosted an AMA for the participants, facilitated by Mattias Ventura’s on-the-spot Spanish translation.
The WordCamp Asia team has published a call for organizers for the January 2021 event — the call will close on June 8.
PHP and core version checks are coming into WordPress. This feature will prevent end-users from installing or activating a theme that is incompatible with their current version of PHP or WordPress. The change that has already been merged to core is slated to land in WordPress 5.5.
April continued to be a challenging time for the WordPress community, with many under stay-at-home recommendations. However, it was also an exciting month in which we created new ways to connect with and inspire each other! This month, amazing contributors moved more WordCamps online and shipped new releases for WordPress and Gutenberg. For the latest, read on.
WordPress 5.4.1 released
On April 24th, WordPress 5.4.1 Release Candidate 1 (RC1) was released for testing, quickly followed by the official release of WordPress 5.4.1 on April 29th. This security release features 17 bug fixes and seven security fixes, so we recommend updating your sites immediately. To download WordPress 5.4.1, visit your Dashboard, click on Updates, then Update Now, or download the latest version directly from WordPress.org. For more information, visit this post, review the full list of changes on Trac, or check out the version 5.4.1 HelpHub documentation page.
It was another exciting month for Gutenberg, with the release of 7.9 and 8.0! Version 7.9 brought new block design tools, three new patterns, and improved block markup. Gutenberg 8.0 continued to refine the new block patterns feature, with additional options for inline formatting, and extending the functionality of the Code Editor. In addition to these new features, both releases included new enhancements and APIs, along with a number of bug fixes, performance improvements, some experiments, and more! You can read all the details about the latest Gutenberg releases in the announcement posts for 7.9 and 8.0.
BuddyPress 6.0.0-beta2 was released for testing in mid-April, leading to the BuddyPress 6.0.0 Release Candidate, announced on April 29. This is an important step before the final release of BuddyPress 6.0.0, which is slated for Thursday, May 14. Changes and new features in this release include moving the profile photo and user cover image under the BP Members component, and a new BP Rest API. Additionally, this release will introduce the first round of BuddyPress Blocks! Last, but not least, BuddyPress 6.0.0 will require at least PHP 5.6 and WordPress 4.8.
WordCamp US will take place online due to the COVID-19 pandemic. The event still runs from October 27-29, 2020, and will be free to anyone who wishes to attend. The team plans to offer what WCUS has historically brought to the community in person: sessions and workshops, Contributor Day, a hallway track, and of course, State of the Word.
Interested in speaking at WCUS? The Call for Speakers is still open! You can apply to speak on the speaker application site until May 31, 2020 at 11:59 pm CDT (UTC-5).
For the latest information about WordCamp US, sign up for updates on the website, or follow Facebook, Twitter, or Instagram.
WordCamp Europe 2020 goes virtual
Last month, WordCamp Europe decided to postpone its Porto event to 2021. This April, the WCEU organizing team announced that the 2020 WordCamp will be online! WordCamp Europe 2020 Online will take place from June 4-6, 2020, and tickets will be free. There will be a virtual Contributor Day on June 4, and then two half days of live-streamed talks and workshops. To participate, get your free ticket here.
This security and maintenance release features 17 bug fixes in addition to 7 security fixes. Because this is a security release, it is recommended that you update your sites immediately. All versions since WordPress 3.7 have also been updated.
WordPress 5.4.1 is a short-cycle security and maintenance release. The next major release will be version 5.5.
You can download WordPress 5.4.1 by downloading from WordPress.org, or visit your Dashboard → Updates and click Update Now.
If you have sites that support automatic background updates, they’ve already started the update process.
Security Updates
Seven security issues affect WordPress versions 5.4 and earlier. If you haven’t yet updated to 5.4, all WordPress versions since 3.7 have also been updated to fix the following security issues:
Props to Muaz Bin Abdus Sattar and Jannes who both independently reported an issue where password reset tokens were not properly invalidated.
Props to ka1n4t for finding an issue where certain private posts can be viewed unauthenticated.
Props to Evan Ricafort for discovering an XSS issue in the Customizer
Props to Ben Bidner from the WordPress Security Team who discovered an XSS issue in the search block.
Props to Nick Daugherty from WordPress VIP / WordPress Security Team who discovered an XSS issue in wp-object-cache.
Props to Ronnie Goodrich (Kahoots) and Jason Medeiros who independently reported an XSS issue in file uploads.
Props to Weston Ruter for fixing a stored XSS vulnerability in the WordPress customizer.
Additionally, an authenticated XSS issue in the block editor was discovered by Nguyen The Duc (ducnt) in WordPress 5.4 RC1 and RC2. It was fixed in 5.4 RC5. We wanted to be sure to give credit and thank them for all of their work in making WordPress more secure.
Thank you to all of the reporters for privately disclosing the vulnerabilities. This gave the security team time to fix the vulnerabilities before WordPress sites could be attacked.
You’ve probably heard that WordPress is open source software, and may know that it’s created and run by volunteers. Enthusiasts share many examples of how WordPress has changed people’s lives for the better. In this monthly series, we share some of those lesser-known, amazing stories.
Computer science in the nineties
Mario has been hooked on computers ever since he got his first one in 1996. He started with digging into MS-DOS and Windows 3.1 first and learned tons by trial and error. Following that adventure, Mario built his first HTML site in 1999. He found development so exciting that he spent day and night learning QBasic and started working at the local PC game club. Mario got involved with several other things related to website administration (translating security bulletins, setting up simple sites, etc) and soon found the technology field was full of activities he really enjoyed.
The Corporate Lifestyle
Mario started studying programming including an intensive high-level course for C#, Java development, and software engineering, and eventually got a job in a corporate environment. He soon became a team lead there, managing all the planning and paperwork for their projects.
But he continued freelancing on the side. He grew his own network of technical experts through attending, volunteering at, and organizing conferences. He also ran a technical forum and regularly spoke at universities and enterprise companies.
Remote Working and Business Opportunity
The combination of a high workload and a daily three-hour-long commute made Mario’s life difficult. Many of his friends were still studying, traveling or unemployed. The blissful and calm lives they lived seemed like a fairy tale to him. And even while both his managers and his clients were abroad, he was unable to obtain permission to work remotely.
So Mario decided to leave his job and start freelancing full time. But he found he faced a massive challenge.
He discovered Java projects were pretty large and required an established team of people working together in an office. All job opportunities were on-site, and some even required relocation abroad. Certified Java programmers weren’t being hired on a remote basis.
As Mario had some PHP experience from previous jobs, he used this to start his freelance career. For his projects, he used both plain PHP and PHP frameworks like CakePHP and CodeIgniter.
For a while, Mario accepted work using commonly known platforms including Joomla, Drupal, and WordPress. In addition, he worked on PHP, Java, Python and some C# projects for a couple of years, after which he decided to switch to WordPress completely.
Building products
One of his projects involved a technically challenging charity backed by several international organizations. Unexpected shortages in the team put him in the technical lead position. As a result, Mario found himself planning the next phases, meeting with the client regularly, and renegotiating the terms. The team completed the project successfully, and after the launch, a TV campaign led millions of visitors to the website.
As a result of the successful launch, this client invited Mario to participate in more WordPress projects, including building a custom framework.
“I wasn’t that acquainted with WordPress back then. For me, a conventional person trained in architectural design patterns and best practices, WordPress seemed like an eccentric young hipster somewhere on the line between insane and genius at the same time. I had to spend a couple of months learning WordPress from the inside out.”
Mario Peshev
As his interest in WordPress grew, Mario stopped delivering other custom platforms, and converted clients to WordPress.
European Community
For Mario, one of the key selling points of WordPress was the international openness. He had previously been involved with other open source communities, some of which were US-focused. He felt they were more reliant on meeting people in person. With events only taking place in the US, this made building relationships much harder for people living in other countries.
While the WordPress project started out in the US, the WordPress community quickly globalized. Dozens of WordCamps and hundreds of Meetup events take place around the globe every year. All of these events bring a wide variety of people sharing their enthusiasm for WordPress together.
For Mario, the birth of WordCamp Europe was something magical. The fact that hundreds, and later on thousands, of people from all over the world gathered around the topic of WordPress speaks for itself. Mario has been involved with organizing WordCamp Europe twice (in 2014 and 2015).
“There’s nothing like meeting WordPress enthusiasts and professionals from more than 50 countries brainstorming and working together at a WordCamp. You simply have to be there to understand how powerful it all is.”
Mario Peshev
Growing businesses and teams
A key WordPress benefit is its popularity – an ever growing project currently powering more than 35% of the Internet [2020]. It’s popular enough to be a de facto standard for websites, platforms, e-commerce and blogs.
WordPress has a low barrier to entry. You can achieve a lot without being an expert, meaning most people can start gaining experience without having to spend years learning how to code. That also makes it easier to build businesses and teams.
“Being able to use a tool that is user-friendly, not overly complicated and easily extensible makes introducing it to team members faster and easier. It requires less time for adjustment, and as a result makes a team stronger and faster. The fact that this tool is cost-effective also allows more startups to enter the market. It requires less time and investments to launch an MVP. This boosts the entire ecosystem.”
Mario Peshev
Helping Others
Mario also introduced WordPress to children and young people. He taught them how to use WordPress as a tool for homework and class assignments. By using WordPress, they were able to learn the basics of designing themes, developing plugins, marketing statistics, social media, copywriting, and so much more. This approachable introduction to the software meant technical skills were not needed.
He was also part of a team of volunteers who helped a group of young people living at a foster home struggling to provide for themselves. The team taught the basic digital literacy skills necessary in the modern workplace and potentially pay for their rent and basic needs. This included working with Microsoft Word, Excel and WordPress, as well as some basic design and marketing skills.
“When you look at that from another perspective, a platform that could save lives – literally – and change the world for better is worth contributing to, in any possible manner.”
Mario Peshev
Contributing to the WordPress community
From the core team to supporting and organizing WordCamps, Mario has long been an active contributor to the global WordPress project. He is passionate about the connections fostered by people who are involved in building both the WordPress software and the community around it.
“The WordPress community consists of people of all race and color, living all around the world, working as teachers, developers, bloggers, designers, business owners. Let’s work together to help each other. Let’s stick together and show the world WordPress can help make it a better place.”
This post is based on an article originally published on HeroPress.com, a community initiative created by Topher DeRosia. HeroPress highlights people in the WordPress community who have overcome barriers and whose stories would otherwise go unheard.
Meet more WordPress community members over at HeroPress.com!
The month of March was both a tough and exciting time for the WordPress open-source project. With COVID-19 declared a pandemic, in-person events have had to adapt quickly – a challenge for any community. March culminated with the release of WordPress 5.4, an exhilarating milestone only made possible by dedicated contributors. For all the latest, read on.
WordPress 5.4 “Adderley”
WordPress 5.4 “Adderley” was released on March 31 and includes a robust list of new blocks, enhancements, and new features for both users and developers. The primary focus areas of this release included the block editor, privacy, accessibility, and developer improvements, with the full list of enhancements covered in the 5.4 field guide.
It’s been another busy month for Gutenberg, this time with the release of Gutenberg 7.7 and 7.8. Gutenberg 7.7 introduced block patterns – predefined block layouts that are ready to use and tweak. This is an important step towards Full Site Editing, which is currently targeted for inclusion in WordPress 5.6. As a first iteration, you can pick and insert patterns from the Block Patterns UI, which has been added as a sidebar plugin.
Gutenberg 7.7 also includes a refresh of the Block UI, which better responds to the ways users interact with the editor. For more information on the User UI and Block Patterns, read this summary of the most recent Block-Based Themes meeting. Gutenberg 7.8, introduced on March 25, further enhanced this Block UI redesign. Both releases also included a suite of improvements, bug fixes, new APIs, documentation, and more!
Want to get involved with the WordPress Community team, host your own virtual WordPress event, or help improve the documentation for all of this? Follow the Community team blog, learn more about virtual events, and join the #community-events channel in the Making WordPress Slack group.
Link your GitHub profile to WordPress.org
Last month, an experimental feature was added to Trac, WordPress Core’s bug-tracking system, to improve collaboration between Trac and GitHub. This month, to help make tracking contributions to the WordPress project across multiple locations easier, there is a new option to connect your GitHub account to your WordPress.org profile. This connection allows for more accurate acknowledgement and recognition of contributors. You can connect your GitHub account to your WordPress.org account by editing your WordPress.org profile.
Defined coding standards is an important step in creating the consistent codebase needed to prepare for requiring PHP 7.x for WordPress Core. As such, coding standards have been proposed for implementation in WordPress Coding Standards 3.0.0. This includes new proposed standards for namespace declarations, import use statements, fully qualified names in inline code, traits and interfaces, type declarations, declare statements/strict typing, the ::class constant, operators, and more.
With COVID-19 preventing in-person community events, the Diverse Speaker Training (#wpdiversity) Group encourages you to host a virtual Diverse Speaker Workshop to prepare speakers for when we are able to meet in person again. To get started, visit this page.
Here it is! Named “Adderley” in honor of Nat Adderley, the latest and greatest version of WordPress is available for download or update in your dashboard.
Say hello to more and better.
More ways to make your pages come alive. With easier ways to get it all done and looking better than ever—and boosts in speed you can feel.
Welcome to WordPress 5.4
Every major release adds more to the block editor.
More ways to make posts and pages come alive with your best images. More ways to bring your visitors in, and keep them engaged, with the richness of embedded media from the web’s top services.
More ways to make your vision real, and put blocks in the perfect place—even if a particular kind of block is new to you. More efficient processes.
And more speed everywhere, so as you build sections or galleries, or just type in a line of prose, you can feel how much faster your work flows.
Two new blocks. And better blocks overall.
Two brand-new blocks: Social Icons and Buttons make adding interactive features fast and easy.
New ways with color: Gradients in the Buttons and Cover block, toolbar access to color options in Rich Text blocks, and for the first time, color options in the Group and Columns blocks.
Guess a whole lot less! Version 5.4 streamlines the whole process for placing and replacing multimedia in every block. Now it works the same way in almost every block!
And if you’ve ever thought your image in the Media+Text block should link to something else—perhaps a picture of a brochure should download that brochure as a document? Well, now it can.
Clearer block navigation with block breadcrumbs. And easier selection once you get there.
For when you need to navigate with the keyboard, better tabbing and focus. Plus, you can tab over to the sidebar of nearly any block.
Speed! 14% faster loading of the editor, 51% faster time-to-type!
Tips are gone. In their place, a Welcome Guide window you can bring up when you need it—and only when you need it—again and again.
Know at a glance whether you’re in a block’s Edit or Navigation mode. Or, if you have restricted vision, your screen reader will tell you which mode you’re in.
Of course, if you want to work with the very latest tools and features, install the Gutenberg plugin. You’ll get to be the first to use new and exciting features in the block editor before anyone else has seen them!
Your fundamental right: privacy
5.4 helps with a variety of privacy issues around the world. So when users and stakeholders ask about regulatory compliance, or how your team handles user data, the answers should be a lot easier to get right.
Take a look:
Now personal data exports include users session information and users location data from the community events widget. Plus, a table of contents!
See progress as you process export and erasure requests through the privacy tools.
Plus, little enhancements throughout give the privacy tools a little cleaner look. Your eyes will thank you!
Just for developers
Add custom fields to menu items—natively
Two new actions let you add custom fields to menu items—without a plugin and without writing custom walkers.
On the Menus admin screen, wp_nav_menu_item_custom_fields fires just before the move buttons of a nav menu item in the menu editor.
In the Customizer, wp_nav_menu_item_custom_fields_customize_template fires at the end of the menu-items form-fields template.
Check your code and see where these new actions can replace your custom code, and if you’re concerned about duplication, add a check for the WordPress version.
Blocks! Simpler styling, new APIs and embeds
Radically simpler block styling. Negative margins and default padding are gone! Now you can style blocks the way you need them. And, a refactor got rid of four redundant wrapper divs.
If you build plugins, now you can register collections of your blocks by namespace across categories—a great way to get more brand visibility.
Let users do more with two new APIs: block variations and gradients.
In embeds, now the block editor supports TikTok—and CollegeHumor is gone.
There’s lots more for developers to love in WordPress 5.4. To discover more and learn how to make these changes shine on your sites, themes, plugins and more, check the WordPress 5.4 Field Guide.
The squad was joined throughout the release cycle by 552 generous volunteer contributors who collectively worked on 361 tickets on Trac and 1226 pull requests on GitHub.
Put on a Nat Adderley playlist, click that update button (or download it directly), and check the profiles of the fine folks that helped:
Many thanks to all of the community volunteers who contribute in the support forums. They answer questions from people across the world, whether they are using WordPress for the first time or since the first release. These releases are more successful for their efforts!
Finally, thanks to all the community translators who worked on WordPress 5.4. Their efforts bring WordPress fully translated to 46 languages at release time, with more on the way.
Please test your plugins and themes against WordPress 5.4 and update the Tested up to version in the readme to 5.4. The priority in testing is compatibility. If you find issues, please be sure to post to the support forums so we can figure them out before the final release.
If you think you’ve found a bug, you can post to the Alpha/Beta area in the support forums. We’d love to hear from you! If you’re comfortable writing a reproducible bug report, file one on WordPress Trac, where you can also find a list of known bugs.