WordPress 5.8.1 Security and Maintenance Release

WordPress 5.8.1 is now available!

This security and maintenance release features 60 bug fixes in addition to 3 security fixes. Because this is a security release, it is recommended that you update your sites immediately. All versions since WordPress 5.4 have also been updated.

WordPress 5.8.1 is a short-cycle security and maintenance release. The next major release will be version 5.9.

You can download WordPress 5.8.1 by downloading from WordPress.org, or by visiting your Dashboard Updates and clicking “Update Now”.

If you have sites that support automatic background updates, they’ve already started the update process.

Security Updates

Three security issues affect WordPress versions between 5.4 and 5.8. If you haven’t yet updated to 5.8, all WordPress versions since 5.4 have also been updated to fix the following security issues:

  • Props to @mdawaffe, a member of the WordPress Security Team, for their work fixing a data exposure vulnerability within the REST API.
  • Props to Michał Bentkowski of Securitum for reporting a XSS vulnerability in the block editor.
  • The Lodash library has been updated to version 4.17.21 in each branch to incorporate upstream security fixes.

In addition to these issues, the security team would like to thank the following people for reporting vulnerabilities during the WordPress 5.8 beta testing period, allowing them to be fixed prior to release:

  • Props to Evan Ricafort for reporting a XSS vulnerability in the block editor discovered during the 5.8 release’s beta period.
  • Props to Steve Henty for reporting a privilege escalation issue in the block editor.

Thank you to all of the reporters for privately disclosing the vulnerabilities. This gave the WordPress 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 5.8.1 HelpHub documentation page.

Thanks and props!

The 5.8.1 release was led by Jonathan Desrosiers and Evan Mullins.

In addition to the security researchers and release squad members mentioned above, thank you to everyone who helped make WordPress 5.8.1 happen: 2linctoolsAdam ZielinskiAlain SchlesserAlex LendealexstineAlGalaAndréAndrei DraganescuAndrew OzzAnkit PanchalAnthony BurchellAnton VlasenkoAri StathopoulosBruno RibaricCarolina NymarkDaisy OlsenDaniel RichardsDariaDavid AndersonDavid BiňovecDavid HerreraDominik SchillingElla van DurpeEnchiridionEvan MullinsGary JonesGeorge MamadashviliGreg ZiółkowskiHéctor PrietoianmjonesJb AudrasJeff BowenJoe DolsonJoen A.John BlackbournJonathan DesrosiersJuanMa GarridoJuliette Reinders FolmerKai HaoKapil PaulKerry LiuKevin FodnessMarcus KazmierczakMark-kMattMichael Adams (mdawaffe)Mike Schrodermoch11Mukesh PanchalNik TsekourasPaal Joachim RomdahlPascal BirchlerPaul BearnePaul BironPeter WilsonPetter Walbø JohnsgårdRadixwebRahul MehtaramonopolyravipatelRiad BenguellaRobert AndersonRodrigo AriasSanket ChodavadiyaSergey BiryukovStephen BernhardtStephen EdgarSteve HentyterralingTimothy JacobstmatsuurTobiasBgTonya MorkToro_Unit (Hiroshi Urabe)Vlad Twb1234, and WFMattR.

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