This security release features four 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 5.8.3 is a short-cycle security release. The next major release will be version 5.9, which is already in the Release Candidate stage.
You can update to WordPress 5.8.3 by downloading from WordPress.org or visiting your Dashboard → Updates and clicking Update Now.
If you have sites that support automatic background updates, they’ve already started the update process.
Four security issues affect WordPress versions between 3.7 and 5.8. If you haven’t yet updated to 5.8, all WordPress versions since 3.7 have also been updated to fix the following security issue (except where noted otherwise):
Thank you to all of the reporters above for privately disclosing the vulnerabilities. This gave the security team time to fix the vulnerabilities before WordPress sites could be attacked. Thank you to the members of the WordPress security team for implementing these fixes in WordPress.
For more information, check out the 5.8.3 HelpHub documentation page.
The 5.8.3 release was led by @desrosj and @circlecube.
In addition to the security researchers and release squad members mentioned above, thank you to everyone who helped make WordPress 5.8.3 happen:
Alex Concha, Dion Hulse, Dominik Schilling, ehtis, Evan Mullins, Jake Spurlock, Jb Audras, Jonathan Desrosiers, Ian Dunn, Peter Wilson, Sergey Biryukov, vortfu, and zieladam.
