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AUSCERT External Security Bulletin Redistribution
WordPress 5.8.1 Security and Maintenance Release
10 September 2021
AusCERT Security Bulletin Summary
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Increased Privileges -- Unknown/Unspecified
Cross-site Scripting -- Unknown/Unspecified
Access Confidential Data -- Unknown/Unspecified
Reduced Security -- Unknown/Unspecified
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WordPress 5.8.1 Security and Maintenance Release
Posted September 9, 2021 by Jonathan Desrosiers . Filed under Releases ,
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
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 visit
your Dashboard -> Updates and click Update Now.
If you have sites that support automatic background updates, they've already
started the update process.
3 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:
o Props @ mdawaffe , member of the WordPress Security Team for their work
fixing a data exposure vulnerability within the REST API.
o Props to Michal Bentkowski of Securitum for reporting a XSS vulnerability
in the block editor.
o 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:
o Props Evan Ricafort for reporting a XSS vulnerability in the block editor
discovered during the 5.8 release's beta period.
o Props Steve Henty for reporting a privilege escalation issue in the block
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:
2linctools , Adam Zielinski , Alain Schlesser , Alex Lende , alexstine , AlGala
, Andre , Andrei Draganescu , Andrew Ozz , Ankit Panchal , Anthony Burchell ,
Anton Vlasenko , Ari Stathopoulos , Bruno Ribaric , Carolina Nymark , Daisy
Olsen , Daniel Richards , Daria , David Anderson , David Binovec , David
Herrera , Dominik Schilling , Ella van Durpe , Enchiridion , Evan Mullins ,
Gary Jones , George Mamadashvili , Greg Ziolkowski , Hector Prieto , ianmjones
, Jb Audras , Jeff Bowen , Joe Dolson , Joen A. , John Blackbourn , Jonathan
Desrosiers , JuanMa Garrido , Juliette Reinders Folmer , Kai Hao , Kapil Paul ,
Kerry Liu , Kevin Fodness , Marcus Kazmierczak , Mark-k , Matt , Michael Adams
(mdawaffe) , Mike Schroder , moch11 , Mukesh Panchal , Nik Tsekouras , Paal
Joachim Romdahl , Pascal Birchler , Paul Bearne , Paul Biron , Peter Wilson ,
Petter Walbo Johnsgard , Radixweb , Rahul Mehta , ramonopoly , ravipatel , Riad
Benguella , Robert Anderson , Rodrigo Arias , Sanket Chodavadiya , Sergey
Biryukov , Stephen Bernhardt , Stephen Edgar , Steve Henty , terraling ,
Timothy Jacobs , tmatsuur , TobiasBg , Tonya Mork , Toro_Unit (Hiroshi Urabe) ,
Vlad T , wb1234 , and WFMattR .
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