ESB-2019.0823 - [Win][UNIX/Linux] WordPress: Cross-site scripting - Remote with user interaction 2019-03-14

Printable version
PGP/GPG verifiable version

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0823
                     WordPress 5.1.1 security release
                               14 March 2019

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           WordPress
Publisher:         WordPress
Operating System:  Windows
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Cross-site Scripting -- Remote with User Interaction
Resolution:        Patch/Upgrade

Original Bulletin: 
   https://wordpress.org/news/2019/03/wordpress-5-1-1-security-and-maintenance-release/

- --------------------------BEGIN INCLUDED TEXT--------------------

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
be attacked.

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
    filtered.
  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
update automatically.

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
.

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=A4n4
-----END PGP SIGNATURE-----

« Back to bulletins