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             AUSCERT External Security Bulletin Redistribution

                     WordPress 5.8.3 Security Release
                              7 January 2022


        AusCERT Security Bulletin Summary

Product:           WordPress
Publisher:         WordPress
Operating System:  Windows
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Execute Arbitrary Code/Commands -- Unknown/Unspecified
                   Cross-site Scripting            -- Unknown/Unspecified
                   Access Confidential Data        -- Unknown/Unspecified
                   Reduced Security                -- Unknown/Unspecified
Resolution:        Patch/Upgrade

Original Bulletin: 

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WordPress 5.8.3 Security Release

Posted January 6, 2022 by Jonathan Desrosiers . Filed under Releases , Security

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.

Security Updates

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):

  o Props to Karim El Ouerghemmi and Simon Scannell of SonarSource for
    disclosing an issue with stored XSS through post slugs.
  o Props to Simon Scannell of SonarSource for reporting an issue with Object
    injection in some multisite installations.
  o Props to ngocnb and khuyenn from GiaoHangTietKiem JSC for working with
    Trend Micro Zero Day Initiative on reporting a SQL injection vulnerability
    in WP_Query.
  o Props to Ben Bidner from the WordPress security team for reporting a SQL
    injection vulnerability in WP_Meta_Query (only relevant to versions

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 .

Thanks and props!

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 .

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