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WordPress 5.4.2 is now available!

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.

You can browse the full list of changes on Trac.

For more info, browse the full list of changes on Trac or check out the Version 5.4.2 documentation page.

WordPress 5.4.2 is a short-cycle maintenance release. The next major release will be version 5.5.

You can download WordPress 5.4.2 from the button at the top of this page, 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.

Thanks and props!

In addition to the security researchers mentioned above, thank you to everyone who helped make WordPress 5.4.2 happen:

Andrea Fercia, argentite, M Asif Rahman, Jb Audras, Ayesh Karunaratne, bdcstr, Delowar Hossain, Rob Migchels, donmhico, Ehtisham Siddiqui, Emilie LEBRUN, finomeno, garethgillman, Giorgio25b, Gabriel Maldonado, Hector F, Ian Belanger, Aaron Jorbin, Mathieu Viet, Javier Casares, Joe McGill, jonkolbert, Jono Alderson, Joy, Tammie Lister, Kjell Reigstad, KT, markusthiel, Mayank Majeji, Mel Choyce-Dwan, mislavjuric, Mukesh Panchal, Nikhil Bhansi, oakesjosh, Dominik Schilling, Arslan Ahmed, Peter Wilson, Carolina Nymark, Stephen Bernhardt, Sam Fullalove, Alain Schlesser, Sergey Biryukov, skarabeq, Daniel Richards, Toni Viemerö, suzylah, Timothy Jacobs, TeBenachi, Jake Spurlock and yuhin.

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WordPress 5.4.1 is now available!

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 CustomizerProps 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.

For more information, browse the full list of changes on Trac, or check out the version 5.4.1 HelpHub documentation page.

In addition to the security researchers mentioned above, thank you to everyone who helped make WordPress 5.4.1 happen:

Alex Concha, Andrea Fercia, Andrew Duthie, Andrew Ozz, Andy Fragen, Andy Peatling, arnaudbroes, Chris Van Patten, Daniel Richards, DhrRob, Dono12, dudo, Ehtisham Siddiqui, Ella van Durpe, Garrett Hyder, Ian Belanger, Ipstenu (Mika Epstein), Jake Spurlock, Jb Audras, John Blackbourn, John James Jacoby, Jonathan Desrosiers, Jorge Costa, K. Adam White, Kelly Choyce-Dwan, MarkRH, mattyrob, Miguel Fonseca, Mohammad Jangda, Mukesh Panchal, Nick Daugherty, noahtallen, Paul Biron, Peter Westwood, Peter Wilson, pikamander2, r-a-y, Riad Benguella, Robert Anderson, Samuel Wood (Otto), Sergey Biryukov, Søren Brønsted, Stanimir Stoyanov, tellthemachines, Timothy Jacobs, Toro_Unit (Hiroshi Urabe), treecutter, and yohannp.

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