WordPress 5.3.1 Security and Maintenance Release
WordPress 5.3.1 is now available!
This security and maintenance release features 46 fixes and enhancements. Plus, it adds a number of security fixes—see the list below.
WordPress 5.3.1 is a short-cycle maintenance release. The next major release will be version 5.4.
You can download WordPress 5.3.1 by clicking 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.
Four security issues affect WordPress versions 5.3 and earlier; version 5.3.1 fixes them, so you’ll want to upgrade. If you haven’t yet updated to 5.3, there are also updated versions of 5.2 and earlier that fix the security issues.
Props to Daniel Bachhuber for finding an issue where an unprivileged user could make a post sticky via the REST API.Props to Simon Scannell of RIPS Technologies for finding and disclosing an issue where cross-site scripting (XSS) could be stored in well-crafted links.Props to the WordPress.org Security Team for hardening wp_kses_bad_protocol() to ensure that it is aware of the named colon attribute.Props to Nguyen The Duc for discovering a stored XSS vulnerability using block editor content.Maintenance updates
Here are a few of the highlights: