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                         AUSCERT Security Bulletin

                               ASB-2011.0001
             A vulnerability has been identified in WordPress
                              4 January 2011

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

Product:              WordPress prior to version 3.0.4
Operating System:     UNIX variants (UNIX, Linux, OSX)
                      Windows
Impact/Access:        Cross-site Scripting -- Remote/Unauthenticated
Resolution:           Patch/Upgrade
Member content until: Thursday, February  3 2011

OVERVIEW

        A vulnerability has been identified in WordPress prior to version 
        3.0.4.


IMPACT

        The vendor has provided the following details regarding this 
        vulnerability:
        
        It "is a very important update to apply to your sites as soon as
        possible because it fixes a core security bug in our HTML sanitation
        library, called KSES. I would rate this release as critical." [1]


MITIGATION

        The vendor recommends upgrading to the latest version of WordPress
        to correct this issue. [1]


REFERENCES

        [1] 3.0.4 Important Security Update
            http://wordpress.org/news/2010/12/3-0-4-update/

AusCERT has made every effort to ensure that the information contained
in this document is accurate.  However, the decision to use the information
described is the responsibility of each user or organisation. 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.

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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.
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