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                         AUSCERT Security Bulletin

                               ASB-2009.1132
                         WordPress 2.8.6 Released
                             13 November 2009

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

Product:              WordPress
Operating System:     UNIX variants (UNIX, Linux, OSX)
                      Windows
Impact/Access:        Execute Arbitrary Code/Commands -- Existing Account
                      Cross-site Scripting            -- Existing Account
Resolution:           Patch/Upgrade
Member content until: Sunday, December 13 2009

Comment: Exploit code for the second vulnerability has been made public.

OVERVIEW

        WordPress 2.8.6 has been released correcting multiple security
        vulnerabilities.


IMPACT

        The vendor has provided the following information regarding these
        vulnerabilities:
        
        "2.8.6 fixes two security problems that can be exploited by 
        registered, logged in users who have posting privileges.  If you 
        have untrusted authors on your blog, upgrading to 2.8.6 is 
        recommended.
        
        The first problem is an XSS vulnerability in Press This discovered 
        by Benjamin Flesch.  The second problem, discovered by Dawid 
        Golunski, is an issue with sanitizing uploaded file names that can 
        be exploited in certain Apache configurations. Thanks to Benjamin 
        and Dawid for finding and reporting these." [1]


MITIGATION

        Users can download WordPress 2.8.6 from the vendor's website. [2]


REFERENCES

        [1] WordPress 2.8.6 Security Release
            http://wordpress.org/development/2009/11/wordpress-2-8-6-security-release/

        [2] Download WordPress
            http://wordpress.org/download/

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.

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

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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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