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AUSCERT External Security Bulletin Redistribution
WordPress 5.1.1 security release
14 March 2019
AusCERT Security Bulletin Summary
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Cross-site Scripting -- Remote with User Interaction
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WordPress 5.1.1 Security and Maintenance Release
Posted March 12, 2019 by Luke Carbis . Filed under Releases .
WordPress 5.1.1 is now available! This security and maintenance release
introduces 10 fixes and enhancements, including changes designed to help hosts
prepare users for the minimum PHP version bump coming in 5.2 .
This release also includes a pair of security fixes that handle how comments
are filtered and then stored in the database. With a maliciously crafted
comment, a WordPress post was vulnerable to cross-site scripting.
WordPress versions 5.1 and earlier are affected by these bugs, which are fixed
in version 5.1.1. Updated versions of WordPress 5.0 and earlier are also
available for any users who have not yet updated to 5.1.
Props toSimon Scannell of RIPS Technologies who discovered this flaw
independent of some work that was being done by members of the core security
team. Thank you to all of the reporters for privately disclosing the
vulnerabilities , which gave us time to fix them before WordPress sites could
Other highlights of this release include:
o Hosts can now offer a button for their users to update PHP.
o The recommended PHP version used by the "Update PHP" notice can now be
o Several minor bug fixes.
You can browse the full list of changes on Trac .
WordPress 5.1.1 was a short-cycle maintenance release. Version 5.1.2 is
expected to follow a similar two week release cadence.
You candownload WordPress 5.1.1 or visit Dashboard -> Updates and click Update
Now . Sites that support automatic background updates have already started to
In addition to the security researcher mentioned above, thank you to everyone
who contributed to WordPress 5.1.1:
Aaron Jorbin , Alex Concha , Andrea Fercia , Andy Fragen , Anton Vanyukov , Ben
Bidner , bulletdigital , David Binovec , Dion Hulse , Felix Arntz , Garrett
Hyder , Gary Pendergast , Ian Dunn , Jake Spurlock , Jb Audras , Jeremy Felt ,
Johan Falk , Jonathan Desrosiers , Luke Carbis , Mike Schroder , Milan Dinic ,
Mukesh Panchal , Paul Biron , Peter Wilson , Sergey Biryukov , and Weston Ruter
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